v3.25.4
Investment Risks - Easterly RocMuni High Income Municipal Bond Fund
Mar. 09, 2026
Prospectus [Line Items]  
Risk [Text Block]

There is no assurance that the Fund will achieve its investment objective. The Fund share price will fluctuate with changes in the market value of its portfolio investments. When you sell your Fund shares, they may be worth less than what you paid for them and, accordingly, you can lose money investing in this Fund.

 

Investment and Market Risk. An investment in the Fund’s common shares is subject to investment risk, including the possible loss of the entire principal amount invested. An investment in the Fund’s common shares represents an indirect investment in the securities owned by the Fund, which are generally traded on a securities exchange or in the over-the-counter (“OTC”) markets. The value of these securities, like other market investments, may move up or down, sometimes rapidly and unpredictably due to changes in general market conditions, economic trends or events that are not specifically related to the issuer of the security or other asset, or factors that affect a particular issuer or issuers, exchange, country, group of countries, region, market, industry, group of industries, sector or asset class. Social, political, economic and other conditions and events (such as war, natural disasters, epidemics and pandemics, terrorism, supply chain disruptions, trade disputes, economic sanctions, imposition of tariffs, elevated of government debt, recessions, a government shutdown, conflicts and social unrest) could have significant impacts on issuers, industries, governments and other systems, including the financial markets. As global systems, economies and financial markets are increasingly interconnected, events that once had only local impact are now more likely to have regional or even global effects.

 

Events that occur in one country, region or financial market will, more frequently, adversely impact issuers in other countries, regions or markets. These impacts can be exacerbated by failures of governments and societies to adequately respond to an emerging event or threat. Investors will be negatively impacted if the value of their portfolio holdings decreases as a result of such events, if these events adversely impact the operations and effectiveness of the Adviser or key service providers or if these events disrupt systems and processes necessary or beneficial to the management of accounts. These events may negatively impact broad segments of businesses and populations and have a significant and rapid negative impact on the performance of the Fund’s investments, increase the Fund’s volatility and exacerbate pre-existing risks to the Fund. The Fund’s common shares at any point in time may be worth less than the original investment, even after taking into account any reinvestment of dividends and distributions.

 

Management Risk. The Fund may not meet its investment objective or may underperform the market or other mutual funds with similar strategies if the Adviser cannot successfully implement the Fund’s investment strategies.

 

Municipal Securities Risk. The municipal market is volatile and can be significantly affected by adverse tax, legislative or political changes and the financial condition of the issuers of municipal securities. Changes in a municipality’s financial health may make it difficult for the municipality to make interest and principal payments when due. Failure of a municipal security issuer to comply with applicable tax requirements may make income paid thereon taxable, resulting in a decline in the security’s value. In addition, there could be changes in applicable tax laws or tax treatments that reduce or eliminate the current federal income tax exemption on municipal securities or otherwise adversely affect the current federal or state tax status of municipal securities. A number of municipalities have had significant financial problems recently, and these and other municipalities could, potentially, continue to experience significant financial problems resulting from lower tax revenues and/or decreased aid from state and local governments in the event of an economic downturn. This could decrease the Fund’s income or hurt the ability to preserve capital and liquidity.

 

Fixed-Income Securities Risks. Fixed-income securities are or may be subject to interest rate, credit, liquidity, prepayment and extension risks. Interest rates may go up resulting in a decrease in the value of the fixed-income securities held by the Fund. Credit risk is the risk that an issuer will not make timely payments of principal and interest. There is also the risk that an issuer may “call,” or repay, its high yielding bonds before their maturity dates. Fixed-income securities subject to prepayment can offer less potential for gains during a declining interest rate environment and similar or greater potential for loss in a rising interest rate environment. Limited trading opportunities for certain fixed-income securities may make it more difficult to sell or buy a security at a favorable price or time. Changes in market conditions and government policies may lead to periods of heightened volatility and reduced liquidity in the fixed-income securities market, and could result in an increase in Fund redemptions. Interest rate changes and their impact on the Fund and its share price can be sudden and unpredictable.

 

●Call Risk. During periods of declining interest rates, a bond issuer may “call,” or repay, its high yielding bonds before their maturity dates. In this event the Fund would then be forced to invest the unanticipated proceeds at lower interest rates, resulting in a decline in its income.

 

●Credit Risk. Fixed-income securities are generally subject to the risk that the issuer may be unable or unwilling to make principal and interest payments when they are due. Lower rated fixed-income securities involve greater credit risk, including the possibility of default or bankruptcy.

 

●Interest Rate Risk. In times of rising interest rates, bond prices will generally decline. Conversely, bond prices generally rise as interest rates fall. Generally, securities with longer maturities and funds with longer weighted average maturities carry greater interest rate risk. The Fund may be exposed to varying levels of interest rate risk due to certain changes in general economic conditions, inflation, and monetary policy, such as interest rate changes by the Federal Reserve.

 

●Extension Risk. In times of rising interest rates, prepayments will slow causing portfolio securities considered short or intermediate term to be long-term securities, which fluctuate more widely in response to changes in interest rates than shorter term securities.

 

●Liquidity Risk. There may be no willing buyer of the Fund’s portfolio securities and the Fund may have to sell those securities at a lower price or may not be able to sell the securities at all, each of which would have a negative effect on performance.

 

●Prepayment Risk. In times of declining interest rates, the Fund’s higher yielding securities may be prepaid and the Fund may have to replace them with securities having a lower yield.

 

●Duration Risk. The Fund can invest in securities of any maturity or duration. Holding long duration and long maturity investments will magnify certain risks, including interest rate risk and credit risk.

 

High-Yield Fixed-Income Securities Risk. High-yield fixed income securities or “junk bonds” are fixed-income securities held by the Fund that are rated below investment grade are subject to additional risk factors such as increased possibility of default, illiquidity of the security, and changes in value based on public perception of the issuer or other company, political, regulatory or economic developments. Such securities are generally considered speculative because they present a greater risk of loss, including default, than higher quality debt securities. The values of junk bonds can decline significantly over short periods of time.

 

Restricted Securities Risk. The Fund may invest in restricted securities (securities with limited transferability under the securities laws) acquired from the issuer in “private placement” transactions. Private placement securities are not registered under the Securities Act, and are subject to restrictions on resale. They are eligible for sale only to certain qualified institutional buyers, like the Fund, and are not sold on a trading market or exchange. While private placement securities offer attractive investment opportunities otherwise not available on an open market, because such securities are available to few buyers, they are often both difficult to sell and to value.

 

Unrated Securities Risk. Because the Fund purchases securities that are not rated by any nationally recognized statistical rating organization, the Adviser may internally assign ratings to those securities, after assessing their credit quality and other factors, in categories similar to those of nationally recognized statistical rating organizations. There can be no assurance, nor is it intended, that the Adviser’s credit analysis process is consistent or comparable with the credit analysis process used by a nationally recognized statistical rating organization. The Adviser’s rating does not constitute a guarantee of the credit quality.

 

Floating Rate/Variable Rate Obligations Risk. Some municipal securities have variable or floating interest rates. Variable rates are adjustable at stated periodic intervals. Because of the interest rate adjustment feature, floating and variable rate securities provide an investor with a certain degree of protection against rises in interest rates, although the Fund will participate in any declines in interest rates as well. Generally, changes in interest rates will have a smaller effect on the market value of floating and variable rate securities than on the market value of comparable fixed-income obligations. Thus, investing in floating and variable rate securities generally allows less opportunity for capital appreciation and depreciation than investing in comparable fixed-income securities.

 

Valuation Risk. The price the Fund could receive upon the sale of any particular portfolio investment may differ from the Fund’s valuation of the investment, particularly for securities that trade in thin or volatile markets or that are valued using a fair valuation methodology or a price provided by an independent pricing service. As a result, the Fund could realize a greater than expected loss or lesser than expected gain upon the sale of the investment. Unlike equity securities, which are valued using market quotations, the municipal bonds in which the Fund primarily invests are fixed income securities which are typically valued using evaluated prices supplied by independent pricing services Such pricing services take into consideration a range of market-based and security specific inputs and assumptions, including price quotations from broker-dealers making markets in such instruments, transactions in comparable investments and considerations about general market conditions. The Fund’s ability to value its investments may also be impacted by technological issues and/or errors by pricing services or other third-party service providers.

 

Tax Risks. Municipal securities may decrease in value during times when federal income tax rates are falling. The Fund’s investments are affected by changes in federal income tax rates applicable to, or the continuing federal tax exempt status of, interest income on municipal obligations. Any proposed or actual changes in such rates or exempt status, therefore, can significantly affect the liquidity, marketability and supply and demand for municipal obligations, which would in turn affect the Fund’s ability to acquire and dispose of municipal obligations at desirable yield and price levels. If you are subject to the federal AMT, you may have to pay federal tax on a portion of your distributions from tax exempt income. If this is the case, the Fund’s net after-tax return to you may be lower. The Fund would typically not be a suitable investment for investors investing through tax exempt or tax-advantaged accounts.

 

Municipal Sector Focus Risk. The Fund will not concentrate its investments in issuers in any one industry. The Securities and Exchange Commission has taken the position that investment of more than 25% of a fund’s total assets in issuers in the same industry constitutes concentration in that industry. Many types of municipal securities (such as general obligation, government appropriation, municipal leases, special assessment and special tax bonds) are not considered a part of any “industry” for purposes of this policy. Therefore, the Fund may invest more than 25% of its total assets in those types of municipal securities. General obligation bonds are generally secured by the obligor’s pledge of its full faith, credit and taxing power for the payment of principal and interest. However, the taxing power of any governmental entity may be limited by provisions of state constitutions or laws and an entity’s credit will depend on many factors. By contrast, revenue bonds are generally backed by and payable from the revenues derived from a specific facility or specific revenue source or sources. As a result, the revenue bonds in which the Fund invests may entail greater credit risk than the Fund’s investments in general obligation bonds. Legislation that affects the financing of a particular municipal project, or economic factors that have a negative impact on a project, would be likely to affect many other similar projects. At times, the Fund may change the relative emphasis of its investments in securities issued by certain municipalities.

 

If the Fund has a greater emphasis on investments in one or more particular municipalities, or in one or more particular municipalities of a particular state or territory, it may be subject to greater risks from adverse events affecting such municipalities, states, or territories than a fund that invests in different municipalities, states, or territories, or that is more diversified.

 

Sector Emphasis Risk. The securities of issuers in the same or related businesses (“industry sectors”), if comprising a significant portion of the Fund’s portfolio, may in some circumstances react negatively to market conditions, interest rates and economic, regulatory or financial developments and adversely affect the value of the portfolio to a greater extent than if such securities comprised a lesser portion of the Fund’s portfolio or the Fund’s portfolio was diversified across a greater number of industry sectors. Some industry sectors have particular risks that may not affect other sectors.

 

Zero-Coupon Bonds Risk. Zero-coupon bonds do not pay interest on a current basis and may be highly volatile as interest rates rise or fall. The higher yields and interest rates on pay-in-kind securities reflect the payment deferral and increased credit risk associated with such instruments and that such investments may represent a higher credit risk than loans that periodically pay interest.

 

Inverse Floaters Risk. The use of Inverse Floaters by the Fund creates effective leverage. Due to the leveraged nature of these investments, they will typically be more volatile and involve greater risk than the fixed rate municipal bonds underlying the Inverse Floaters. The price of Inverse Floaters is expected to decline when interest rates rise, and generally will decline further than the price of a bond with a similar maturity. An investment in certain Inverse Floaters will involve the risk that the Fund could lose more than its original principal investment.

 

Leverage and Borrowing Risk. The use of leverage will allow the Fund to make additional investments, thereby increasing its exposure to assets, such that its total assets may be greater than its capital. Leverage will magnify changes in the Fund’s net asset value (“NAV”) and on the Fund’s investments. The effect of the use of leverage by the Fund in a market that moves adversely to its investments could result in substantial losses to the Fund, which would be greater than if the Fund were not leveraged. The Fund may borrow money for investment purposes, which is a form of leveraging. Leverage created from borrowing money or certain types of transactions or instruments may impair the Fund’s liquidity, cause it to liquidate positions at an unfavorable time, increase volatility or otherwise not achieve its intended objective. Leveraging investments by purchasing securities with borrowed money is a speculative technique that increases investment risk while increasing investment opportunity. Although the principal of such borrowings will be fixed, the Fund’s assets may change in value during the time the borrowing is outstanding. Leverage also creates interest expenses for the Fund.

 

Defaulted Bonds Risk. Defaulted bonds are subject to greater risk of loss of income and principal than higher rated securities and are considered speculative. In the event of a default, the Fund may incur additional expenses to seek recovery. The repayment of defaulted bonds is subject to significant uncertainties, and in some cases, there may be no recovery of repayment. Defaulted bonds might be repaid only after lengthy workout or bankruptcy proceedings, during which the issuer might not make any interest or other payments. Workout or bankruptcy proceedings typically result in only partial recovery of cash payments or an exchange of the defaulted bond for other securities of the issuer or its affiliates, which may in turn be illiquid or speculative.

 

Rule 144A Securities Risk. The market for Rule 144A securities typically is less active than the market for publicly-traded securities. Rule 144A securities carry the risk that the liquidity of these securities may become impaired, making it more difficult for the Fund to sell these bonds.

 

Liquidity Risk. Liquidity risk occurs when certain investments become difficult to purchase or sell. Difficulty in selling less liquid securities may result in sales at disadvantageous prices affecting the value of your investment in the Fund. Liquid securities can become illiquid, particularly during periods of market stress. If a significant amount of the Fund’s securities become illiquid, the Fund may not be able to timely pay redemption proceeds and may need to sell securities at significantly reduced prices.

 

Deferred Interest and Payment In Kind Securities Risks. Because these securities bear no interest and compound semiannually at the rate fixed at the time of issuance, their value generally is more volatile than the value of other fixed income securities. Accordingly, these securities may involve greater credit risks and their value is subject to greater fluctuation in response to changes in market interest rates than other fixed income securities.

 

Auction Rate Securities Risks. While the auction rate process is designed to permit the holder to sell the auction rate securities in an auction at par value at specified intervals, there is the risk that an auction will fail due to insufficient demand for the securities. Failed auctions may adversely impact the liquidity of auction rate securities investments. Auction rate securities may also be subject to changes in interest rates, including decreased interest rates. Although some issuers of auction rate securities are redeeming or are considering redeeming such securities, such issuers are not obligated to do so and, therefore, there is no guarantee that a liquid market will exist for the Fund’s investments in auction rate securities at a time when the Fund wishes to dispose of such securities.

 

Shares of the Fund are not bank deposits and are not guaranteed or insured by the Federal Deposit Insurance Corporation or any other government agency.

Investment And Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Investment and Market Risk. An investment in the Fund’s common shares is subject to investment risk, including the possible loss of the entire principal amount invested. An investment in the Fund’s common shares represents an indirect investment in the securities owned by the Fund, which are generally traded on a securities exchange or in the over-the-counter (“OTC”) markets. The value of these securities, like other market investments, may move up or down, sometimes rapidly and unpredictably due to changes in general market conditions, economic trends or events that are not specifically related to the issuer of the security or other asset, or factors that affect a particular issuer or issuers, exchange, country, group of countries, region, market, industry, group of industries, sector or asset class. Social, political, economic and other conditions and events (such as war, natural disasters, epidemics and pandemics, terrorism, supply chain disruptions, trade disputes, economic sanctions, imposition of tariffs, elevated of government debt, recessions, a government shutdown, conflicts and social unrest) could have significant impacts on issuers, industries, governments and other systems, including the financial markets. As global systems, economies and financial markets are increasingly interconnected, events that once had only local impact are now more likely to have regional or even global effects.

 

Events that occur in one country, region or financial market will, more frequently, adversely impact issuers in other countries, regions or markets. These impacts can be exacerbated by failures of governments and societies to adequately respond to an emerging event or threat. Investors will be negatively impacted if the value of their portfolio holdings decreases as a result of such events, if these events adversely impact the operations and effectiveness of the Adviser or key service providers or if these events disrupt systems and processes necessary or beneficial to the management of accounts. These events may negatively impact broad segments of businesses and populations and have a significant and rapid negative impact on the performance of the Fund’s investments, increase the Fund’s volatility and exacerbate pre-existing risks to the Fund. The Fund’s common shares at any point in time may be worth less than the original investment, even after taking into account any reinvestment of dividends and distributions.

 

Management Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Management Risk. The Fund may not meet its investment objective or may underperform the market or other mutual funds with similar strategies if the Adviser cannot successfully implement the Fund’s investment strategies.

Municipal Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Municipal Securities Risk. The municipal market is volatile and can be significantly affected by adverse tax, legislative or political changes and the financial condition of the issuers of municipal securities. Changes in a municipality’s financial health may make it difficult for the municipality to make interest and principal payments when due. Failure of a municipal security issuer to comply with applicable tax requirements may make income paid thereon taxable, resulting in a decline in the security’s value. In addition, there could be changes in applicable tax laws or tax treatments that reduce or eliminate the current federal income tax exemption on municipal securities or otherwise adversely affect the current federal or state tax status of municipal securities. A number of municipalities have had significant financial problems recently, and these and other municipalities could, potentially, continue to experience significant financial problems resulting from lower tax revenues and/or decreased aid from state and local governments in the event of an economic downturn. This could decrease the Fund’s income or hurt the ability to preserve capital and liquidity.

 

Fixedincome Securities Risks [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Fixed-Income Securities Risks. Fixed-income securities are or may be subject to interest rate, credit, liquidity, prepayment and extension risks. Interest rates may go up resulting in a decrease in the value of the fixed-income securities held by the Fund. Credit risk is the risk that an issuer will not make timely payments of principal and interest. There is also the risk that an issuer may “call,” or repay, its high yielding bonds before their maturity dates. Fixed-income securities subject to prepayment can offer less potential for gains during a declining interest rate environment and similar or greater potential for loss in a rising interest rate environment. Limited trading opportunities for certain fixed-income securities may make it more difficult to sell or buy a security at a favorable price or time. Changes in market conditions and government policies may lead to periods of heightened volatility and reduced liquidity in the fixed-income securities market, and could result in an increase in Fund redemptions. Interest rate changes and their impact on the Fund and its share price can be sudden and unpredictable.

 

●Call Risk. During periods of declining interest rates, a bond issuer may “call,” or repay, its high yielding bonds before their maturity dates. In this event the Fund would then be forced to invest the unanticipated proceeds at lower interest rates, resulting in a decline in its income.

 

●Credit Risk. Fixed-income securities are generally subject to the risk that the issuer may be unable or unwilling to make principal and interest payments when they are due. Lower rated fixed-income securities involve greater credit risk, including the possibility of default or bankruptcy.

 

●Interest Rate Risk. In times of rising interest rates, bond prices will generally decline. Conversely, bond prices generally rise as interest rates fall. Generally, securities with longer maturities and funds with longer weighted average maturities carry greater interest rate risk. The Fund may be exposed to varying levels of interest rate risk due to certain changes in general economic conditions, inflation, and monetary policy, such as interest rate changes by the Federal Reserve.

 

●Extension Risk. In times of rising interest rates, prepayments will slow causing portfolio securities considered short or intermediate term to be long-term securities, which fluctuate more widely in response to changes in interest rates than shorter term securities.

 

●Liquidity Risk. There may be no willing buyer of the Fund’s portfolio securities and the Fund may have to sell those securities at a lower price or may not be able to sell the securities at all, each of which would have a negative effect on performance.

 

●Prepayment Risk. In times of declining interest rates, the Fund’s higher yielding securities may be prepaid and the Fund may have to replace them with securities having a lower yield.

 

●Duration Risk. The Fund can invest in securities of any maturity or duration. Holding long duration and long maturity investments will magnify certain risks, including interest rate risk and credit risk.
Call Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
●Call Risk. During periods of declining interest rates, a bond issuer may “call,” or repay, its high yielding bonds before their maturity dates. In this event the Fund would then be forced to invest the unanticipated proceeds at lower interest rates, resulting in a decline in its income.

 

Credit Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
●Credit Risk. Fixed-income securities are generally subject to the risk that the issuer may be unable or unwilling to make principal and interest payments when they are due. Lower rated fixed-income securities involve greater credit risk, including the possibility of default or bankruptcy.

 

Interest Rate Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
●Interest Rate Risk. In times of rising interest rates, bond prices will generally decline. Conversely, bond prices generally rise as interest rates fall. Generally, securities with longer maturities and funds with longer weighted average maturities carry greater interest rate risk. The Fund may be exposed to varying levels of interest rate risk due to certain changes in general economic conditions, inflation, and monetary policy, such as interest rate changes by the Federal Reserve.

 

Extension Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
●Extension Risk. In times of rising interest rates, prepayments will slow causing portfolio securities considered short or intermediate term to be long-term securities, which fluctuate more widely in response to changes in interest rates than shorter term securities.

 

Liquidity Risks [Member]  
Prospectus [Line Items]  
Risk [Text Block]
●Liquidity Risk. There may be no willing buyer of the Fund’s portfolio securities and the Fund may have to sell those securities at a lower price or may not be able to sell the securities at all, each of which would have a negative effect on performance.

 

Prepayment Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
●Prepayment Risk. In times of declining interest rates, the Fund’s higher yielding securities may be prepaid and the Fund may have to replace them with securities having a lower yield.

 

Duration Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
●Duration Risk. The Fund can invest in securities of any maturity or duration. Holding long duration and long maturity investments will magnify certain risks, including interest rate risk and credit risk.

 

High Yield Fixed Income Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

High-Yield Fixed-Income Securities Risk. High-yield fixed income securities or “junk bonds” are fixed-income securities held by the Fund that are rated below investment grade are subject to additional risk factors such as increased possibility of default, illiquidity of the security, and changes in value based on public perception of the issuer or other company, political, regulatory or economic developments. Such securities are generally considered speculative because they present a greater risk of loss, including default, than higher quality debt securities. The values of junk bonds can decline significantly over short periods of time.

 

Restricted Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Restricted Securities Risk. The Fund may invest in restricted securities (securities with limited transferability under the securities laws) acquired from the issuer in “private placement” transactions. Private placement securities are not registered under the Securities Act, and are subject to restrictions on resale. They are eligible for sale only to certain qualified institutional buyers, like the Fund, and are not sold on a trading market or exchange. While private placement securities offer attractive investment opportunities otherwise not available on an open market, because such securities are available to few buyers, they are often both difficult to sell and to value.

 

Unrated Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Unrated Securities Risk. Because the Fund purchases securities that are not rated by any nationally recognized statistical rating organization, the Adviser may internally assign ratings to those securities, after assessing their credit quality and other factors, in categories similar to those of nationally recognized statistical rating organizations. There can be no assurance, nor is it intended, that the Adviser’s credit analysis process is consistent or comparable with the credit analysis process used by a nationally recognized statistical rating organization. The Adviser’s rating does not constitute a guarantee of the credit quality.

Floating Ratevariable Rate Obligations Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Floating Rate/Variable Rate Obligations Risk. Some municipal securities have variable or floating interest rates. Variable rates are adjustable at stated periodic intervals. Because of the interest rate adjustment feature, floating and variable rate securities provide an investor with a certain degree of protection against rises in interest rates, although the Fund will participate in any declines in interest rates as well. Generally, changes in interest rates will have a smaller effect on the market value of floating and variable rate securities than on the market value of comparable fixed-income obligations. Thus, investing in floating and variable rate securities generally allows less opportunity for capital appreciation and depreciation than investing in comparable fixed-income securities.

 

Valuation Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Valuation Risk. The price the Fund could receive upon the sale of any particular portfolio investment may differ from the Fund’s valuation of the investment, particularly for securities that trade in thin or volatile markets or that are valued using a fair valuation methodology or a price provided by an independent pricing service. As a result, the Fund could realize a greater than expected loss or lesser than expected gain upon the sale of the investment. Unlike equity securities, which are valued using market quotations, the municipal bonds in which the Fund primarily invests are fixed income securities which are typically valued using evaluated prices supplied by independent pricing services Such pricing services take into consideration a range of market-based and security specific inputs and assumptions, including price quotations from broker-dealers making markets in such instruments, transactions in comparable investments and considerations about general market conditions. The Fund’s ability to value its investments may also be impacted by technological issues and/or errors by pricing services or other third-party service providers.

 

Tax Risks [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Tax Risks. Municipal securities may decrease in value during times when federal income tax rates are falling. The Fund’s investments are affected by changes in federal income tax rates applicable to, or the continuing federal tax exempt status of, interest income on municipal obligations. Any proposed or actual changes in such rates or exempt status, therefore, can significantly affect the liquidity, marketability and supply and demand for municipal obligations, which would in turn affect the Fund’s ability to acquire and dispose of municipal obligations at desirable yield and price levels. If you are subject to the federal AMT, you may have to pay federal tax on a portion of your distributions from tax exempt income. If this is the case, the Fund’s net after-tax return to you may be lower. The Fund would typically not be a suitable investment for investors investing through tax exempt or tax-advantaged accounts.

 

Municipal Sector Focus Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Municipal Sector Focus Risk. The Fund will not concentrate its investments in issuers in any one industry. The Securities and Exchange Commission has taken the position that investment of more than 25% of a fund’s total assets in issuers in the same industry constitutes concentration in that industry. Many types of municipal securities (such as general obligation, government appropriation, municipal leases, special assessment and special tax bonds) are not considered a part of any “industry” for purposes of this policy. Therefore, the Fund may invest more than 25% of its total assets in those types of municipal securities. General obligation bonds are generally secured by the obligor’s pledge of its full faith, credit and taxing power for the payment of principal and interest. However, the taxing power of any governmental entity may be limited by provisions of state constitutions or laws and an entity’s credit will depend on many factors. By contrast, revenue bonds are generally backed by and payable from the revenues derived from a specific facility or specific revenue source or sources. As a result, the revenue bonds in which the Fund invests may entail greater credit risk than the Fund’s investments in general obligation bonds. Legislation that affects the financing of a particular municipal project, or economic factors that have a negative impact on a project, would be likely to affect many other similar projects. At times, the Fund may change the relative emphasis of its investments in securities issued by certain municipalities.

 

If the Fund has a greater emphasis on investments in one or more particular municipalities, or in one or more particular municipalities of a particular state or territory, it may be subject to greater risks from adverse events affecting such municipalities, states, or territories than a fund that invests in different municipalities, states, or territories, or that is more diversified.

 

Sector Emphasis Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Sector Emphasis Risk. The securities of issuers in the same or related businesses (“industry sectors”), if comprising a significant portion of the Fund’s portfolio, may in some circumstances react negatively to market conditions, interest rates and economic, regulatory or financial developments and adversely affect the value of the portfolio to a greater extent than if such securities comprised a lesser portion of the Fund’s portfolio or the Fund’s portfolio was diversified across a greater number of industry sectors. Some industry sectors have particular risks that may not affect other sectors.

 

Zero Coupon Bonds Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Zero-Coupon Bonds Risk. Zero-coupon bonds do not pay interest on a current basis and may be highly volatile as interest rates rise or fall. The higher yields and interest rates on pay-in-kind securities reflect the payment deferral and increased credit risk associated with such instruments and that such investments may represent a higher credit risk than loans that periodically pay interest.

 

Inverse Floaters Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Inverse Floaters Risk. The use of Inverse Floaters by the Fund creates effective leverage. Due to the leveraged nature of these investments, they will typically be more volatile and involve greater risk than the fixed rate municipal bonds underlying the Inverse Floaters. The price of Inverse Floaters is expected to decline when interest rates rise, and generally will decline further than the price of a bond with a similar maturity. An investment in certain Inverse Floaters will involve the risk that the Fund could lose more than its original principal investment.

Leverage And Borrowing Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Leverage and Borrowing Risk. The use of leverage will allow the Fund to make additional investments, thereby increasing its exposure to assets, such that its total assets may be greater than its capital. Leverage will magnify changes in the Fund’s net asset value (“NAV”) and on the Fund’s investments. The effect of the use of leverage by the Fund in a market that moves adversely to its investments could result in substantial losses to the Fund, which would be greater than if the Fund were not leveraged. The Fund may borrow money for investment purposes, which is a form of leveraging. Leverage created from borrowing money or certain types of transactions or instruments may impair the Fund’s liquidity, cause it to liquidate positions at an unfavorable time, increase volatility or otherwise not achieve its intended objective. Leveraging investments by purchasing securities with borrowed money is a speculative technique that increases investment risk while increasing investment opportunity. Although the principal of such borrowings will be fixed, the Fund’s assets may change in value during the time the borrowing is outstanding. Leverage also creates interest expenses for the Fund.

 

Defaulted Bonds Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Defaulted Bonds Risk. Defaulted bonds are subject to greater risk of loss of income and principal than higher rated securities and are considered speculative. In the event of a default, the Fund may incur additional expenses to seek recovery. The repayment of defaulted bonds is subject to significant uncertainties, and in some cases, there may be no recovery of repayment. Defaulted bonds might be repaid only after lengthy workout or bankruptcy proceedings, during which the issuer might not make any interest or other payments. Workout or bankruptcy proceedings typically result in only partial recovery of cash payments or an exchange of the defaulted bond for other securities of the issuer or its affiliates, which may in turn be illiquid or speculative.

 

Rule 144 A Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Rule 144A Securities Risk. The market for Rule 144A securities typically is less active than the market for publicly-traded securities. Rule 144A securities carry the risk that the liquidity of these securities may become impaired, making it more difficult for the Fund to sell these bonds.

 

Liquidity Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Liquidity Risk. Liquidity risk occurs when certain investments become difficult to purchase or sell. Difficulty in selling less liquid securities may result in sales at disadvantageous prices affecting the value of your investment in the Fund. Liquid securities can become illiquid, particularly during periods of market stress. If a significant amount of the Fund’s securities become illiquid, the Fund may not be able to timely pay redemption proceeds and may need to sell securities at significantly reduced prices.

 

Deferred Interest And Payment In Kind Securities Risks [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Deferred Interest and Payment In Kind Securities Risks. Because these securities bear no interest and compound semiannually at the rate fixed at the time of issuance, their value generally is more volatile than the value of other fixed income securities. Accordingly, these securities may involve greater credit risks and their value is subject to greater fluctuation in response to changes in market interest rates than other fixed income securities.

 

Auction Rate Securities Risks [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Auction Rate Securities Risks. While the auction rate process is designed to permit the holder to sell the auction rate securities in an auction at par value at specified intervals, there is the risk that an auction will fail due to insufficient demand for the securities. Failed auctions may adversely impact the liquidity of auction rate securities investments. Auction rate securities may also be subject to changes in interest rates, including decreased interest rates. Although some issuers of auction rate securities are redeeming or are considering redeeming such securities, such issuers are not obligated to do so and, therefore, there is no guarantee that a liquid market will exist for the Fund’s investments in auction rate securities at a time when the Fund wishes to dispose of such securities.

 

Risk Not Insured Depository Institution [Member]  
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Risk [Text Block]

Shares of the Fund are not bank deposits and are not guaranteed or insured by the Federal Deposit Insurance Corporation or any other government agency.