The
Portfolio is a “fund of funds”, which means that the Portfolio generally allocates its assets among
other funds managed by the Advisor, although it has the ability to invest directly in securities and
derivatives. To achieve its investment objective, the 2070 Target Date Portfolio allocates its assets
to other mutual funds managed by the Advisor (i.e., the Underlying Funds) according to an asset allocation
strategy designed for investors planning to retire in or within a few years of 2070 (the target date)
and are planning to withdraw the value of the investment in the Portfolio over many years after the target
date. Over time, the Portfolio’s allocation to the Underlying Funds is expected to change based on
an asset allocation strategy that generally becomes more conservative (reducing its allocation to equity
Underlying Funds and increasing its allocation to fixed income Underlying Funds) until reaching the “landing
point,” which is 15 years after the target date (i.e., 2085 in the case of the Portfolio), at which
time the Portfolio reaches its final static asset allocation. At the final landing point, the Portfolio
is expected to reach a final static asset allocation of 15% to 25% of its assets allocated to domestic
and international equity Underlying Funds and 75% to 85% of its assets allocated to fixed income Underlying
Funds. The asset allocation strategy for the Portfolio reflects the need for reduced equity risk and
lower volatility of the inflation-adjusted income the Portfolio may be able to support in retirement
as an investor gets closer to the target date. When the Portfolio reaches the landing point, it is expected
that the Advisor will recommend that the Board of Directors of the Portfolio approve combining the Portfolio
with the Dimensional Retirement Income Fund, another fund managed by the Advisor, which is expected to
have approximately the same asset allocation as the Portfolio at that time. As
of the date of this prospectus, the 2070 Target Date Portfolio has a target allocation of 75% to 97%
to equity Underlying Funds and a target allocation of approximately 3% to 25% to fixed income Underlying
Funds, which may include exposure through those fixed income Underlying Funds to long-term and intermediate-term
U.S. Treasury Inflation-Protected Securities (“TIPS”). As of the date of this prospectus, the Portfolio
may invest in: (1) domestic equity Underlying Funds that purchase a broad and diverse portfolio of securities
of U.S. operating companies; (2) international equity Underlying Funds that purchase a broad and diverse
portfolio of securities of companies in developed and emerging markets; and (3) fixed income Underlying
Funds that may purchase U.S. and foreign debt securities such as obligations issued or guaranteed by
the U.S. and foreign governments, their agencies and instrumentalities, long-, intermediate- and short-term
TIPS, bank obligations, commercial paper, repurchase agreements, money market funds, obligations of other
domestic and foreign issuers, securities of domestic and foreign issuers denominated in U.S. dollars
but not trading in the United States, obligations of supranational organizations, and inflation-protected
securities. The fixed income Underlying Funds primarily invest in securities that are considered investment
grade at the time of purchase and which have a range of maturities, including ultra-short, short, intermediate,
and long-term. Certain equity Underlying Funds purchase a broad and diverse group of securities of companies
with a greater emphasis on smaller capitalization, lower relative price, and higher profitability companies
as compared to their representation in the universe of securities such Underlying Funds invest in. A
summary of the investment strategies and policies of the Underlying Funds in which the Portfolio invests
as of the date of this Prospectus is described in the Portfolio’s Prospectus in the section entitled
“ADDITIONAL INFORMATION ON INVESTMENT OBJECTIVE AND POLICIES.” The
2070 Target Date Portfolio and each Underlying Fund may purchase or sell futures contracts and options
on futures contracts, to adjust market exposure based on actual or expected cash inflows to or outflows
from the Portfolio or Underlying Fund. Certain Underlying Funds may enter into foreign currency exchange
transactions, including foreign currency forward contracts, in connection with the settlement of foreign
securities, to hedge foreign currency risks, to hedge against fluctuations in currency exchange rates
or to transfer balances from one currency to another. Certain Underlying Funds also may enter into swaps
to hedge against inflation risk associated with certain securities or to buy or sell credit protection
to hedge its credit exposure; gain market or issuer exposure without owning the underlying securities;
or increase the Underlying Fund’s total return. Certain Underlying Funds also may purchase or sell
futures contracts and options on futures contracts, to hedge their interest rate or currency exposure
or for non-hedging purposes, such as a substitute for direct investment. Also,
the 2070 Target Date Portfolio and the Underlying Funds may lend their portfolio securities to generate
additional income.
|
Risk Table - Dimensional 2070 Target Date Retirement Income Fund
|
Risk [Text Block] |
| Risk Lose Money [Member] |
Because the value of your
investment in the Portfolio will fluctuate, there is the risk that you will lose money.
|
| Risk Not Insured [Member] |
An investment
in the Portfolio is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance
Corporation or any other government agency.
|
| Fund of Funds Risk |
Fund of Funds Risk:
The investment performance of a fund of funds is affected by the investment performance
of the underlying funds in which the fund of funds invests. The ability of a fund of funds to achieve
its investment objective depends on the ability of the underlying funds to meet their investment objectives
and on the Advisor’s decisions regarding the allocation of a fund of funds’ assets among the underlying
funds. A fund of funds may allocate assets to an underlying fund or asset class that underperforms other
funds or asset classes. There can be no assurance that the investment objective of a fund of funds or
any underlying fund will be achieved. Through its investments in the underlying funds, a fund of funds
is subject to the risks of the underlying funds’ investments. When a fund of funds invests in underlying
funds, investors are exposed to a proportionate share of the expenses of those underlying funds in addition
to the expenses of a fund of funds. Certain risks of the Underlying Funds’ investments that are principal
risks of investing in the Portfolio are described below.
|
| Equity Market Risk |
Equity
Market Risk: Even a long-term investment
approach cannot guarantee a profit. Economic, market, political, and issuer-specific conditions and events
will cause the value of equity securities, and a fund that owns them, to rise or fall. Stock markets
are volatile, with periods of rising prices and periods of falling prices.
|
| Market Risk |
Market Risk: Even a long-term investment
approach cannot guarantee a profit. Economic, political, and issuer-specific events will cause the value
of securities, and a fund that owns them, to rise or fall.
|
| Foreign Securities and Currencies Risk |
Foreign
Securities and Currencies Risk: Foreign securities prices
may decline or fluctuate because of: (a) economic or political actions of foreign governments, and/or
(b) less regulated or liquid securities markets. Investors holding these securities may also be exposed
to foreign currency risk (the possibility that foreign currency will fluctuate in value against the U.S.
dollar or that a foreign government will convert, or be forced to convert, its currency to another currency,
changing its value against the U.S. dollar). Foreign issuers may not
be subject to uniform accounting, auditing and financial reporting standards and there may be less publicly
available financial and other information about such issuers, comparable to U.S. issuers. A fund may
have greater difficulty voting proxies, exercising shareholder rights, securing dividends and obtaining
information regarding corporate actions on a timely basis, pursuing legal remedies, and obtaining judgments
with respect to foreign investments in foreign courts than with respect to domestic issuers in U.S. courts. Depositary
receipts are generally subject to the same risks as the foreign securities that they evidence or into
which they may be converted. In addition, the underlying issuers of certain depositary receipts, particularly
unsponsored or unregistered depositary receipts, are under no obligation to distribute shareholder communications
to the holders of such receipts, or to pass through to them any voting rights with respect to the deposited
securities. Depositary receipts that are not sponsored by the issuer may be less liquid and there may
be less readily available public information about the issuer.
|
| Foreign Government Debt Risk |
Foreign Government Debt Risk: The
risk that: (a) the governmental entity that controls the repayment of government debt may not be willing
or able to repay the principal and/or to pay the interest when it becomes due, due to factors such as
political considerations, the relative size of the governmental entity’s debt position in relation
to the economy, cash flow problems, insufficient foreign currency reserves, the failure to put in place
economic reforms required by the International Monetary Fund or other multilateral agencies, and/or other
national economic factors; (b) governments may default on their debt securities, which may require holders
of such securities to participate in debt rescheduling; and (c) there is no legal or bankruptcy process
by which defaulted government debt may be collected in whole or in part.
|
| Small and Mid-Cap Company Risk |
Small and Mid-Cap Company Risk: Securities of small and
mid-cap companies are often less liquid than those of large companies and this could make it difficult
to sell a small or mid-cap company security at a desired time or price. As a result, small and mid-cap
company stocks may fluctuate relatively more in price. In general, small and mid-capitalization companies are also more vulnerable than larger companies to
adverse business or economic developments and they may have more limited resources.
|
| Profitability Investment Risk |
Profitability Investment Risk: High relative profitability
stocks may perform differently from the market as a whole and an investment strategy purchasing these
securities may cause a fund to at times underperform equity funds that use other investment strategies.
|
| Value Investment Risk |
Value Investment Risk: Value stocks may perform
differently from the market as a whole and an investment strategy purchasing these securities may cause
a fund to at times underperform equity funds that use other investment strategies. Value stocks can react
differently to political, economic, and industry developments than the market as a whole and other types
of stocks. Value stocks also may underperform the market for long periods of time.
|
| Emerging Markets Risk |
Emerging Markets Risk: Securities of issuers associated
with emerging market countries may be subject to higher and additional risks than securities of issuers
in developed foreign markets. Numerous emerging market countries
have a history of, and continue to experience serious, and potentially continuing, economic and political
problems. Stock markets in many emerging market countries are relatively small, expensive to trade in
and generally have higher risks than those in developed markets. Securities in emerging markets also
may be less liquid than those in developed markets and foreigners are often limited in their ability
to invest in, and withdraw assets from, these markets. Additional restrictions may be imposed under other
conditions. Frontier market countries generally have smaller economies or less developed capital markets
and, as a result, the risks of investing in emerging market countries are magnified in frontier market
countries.
|
| Interest Rate Risk |
Interest Rate Risk:
Fixed income securities are subject to interest rate risk because the prices of
fixed income securities tend to move in the opposite direction of interest rates. When interest rates
rise, fixed income security prices fall. During periods of very low or negative interest rates, a fund
may be subject to a greater risk of rising interest rates. When interest rates fall, fixed income security
prices rise. In general, fixed income securities with longer maturities are more sensitive to changes
in interest rates.
|
| Credit Risk |
Credit Risk: Credit
risk is the risk that the issuer of a security may be unable to make interest payments and/or repay principal
when due. A downgrade to an issuer’s credit rating or a perceived change in an issuer’s financial
strength may affect a security’s value, and thus, impact the performance of a fund holding such securities.
Government agency obligations have different levels of credit support and, therefore, different degrees
of credit risk. Securities issued by agencies and instrumentalities of the U.S. Government that are supported
by the full faith and credit of the United States, such as the Federal Housing Administration and Ginnie
Mae, present little credit risk. Other securities issued by agencies and instrumentalities sponsored
by the U.S. Government, that are supported only by the issuer’s right to borrow from the U.S. Treasury,
subject to certain limitations, and securities issued by agencies and instrumentalities sponsored by
the U.S. Government that are sponsored by the credit of the issuing agencies, such as Freddie Mac and
Fannie Mae, are subject to a greater degree of credit risk. U.S. government agency securities issued
or guaranteed by the credit of the agency may still involve a risk of non-payment of principal and/or
interest. Credit risk is greater for fixed income securities with ratings below investment grade (e.g.,
BB+ or below by S&P or Fitch or Ba1 or below by Moody’s).
|
| Risks of Investing for Inflation Protection |
Risks of Investing for Inflation Protection: Because
the interest and/or principal payments on an inflation-protected security are adjusted periodically for
changes in inflation, the income distributed by a fund investing in such securities may be irregular.
Although the U.S. Treasury guarantees to pay at maturity at least the original face value of any inflation-protected
securities the Treasury issues, other issuers may not offer the same guarantee. Inflation-protected securities
are not protected against deflation. As a result, in a period of deflation, the principal and income
of inflation-protected securities held by a fund will decline and the fund may suffer a loss during such
periods. While inflation-protected securities are expected to be protected from long-term inflationary
trends, short-term increases in inflation may lead to a decline in the value of a fund holding such securities.
For example, if interest rates rise due to reasons other than inflation, a fund’s investment in these
securities may not be protected to the extent that the increase is not reflected in the securities’
inflation measures. In addition, positive adjustments to principal generally will result in taxable income
to a fund at the time of such adjustments (which generally would be distributed by the fund as part of
its taxable dividends), even though the principal amount is not paid until maturity. The current market
value of inflation-protected securities is not guaranteed and will fluctuate.
|
| Inflation-Protected Securities Interest Rate Risk |
Inflation-Protected Securities Interest Rate Risk: Inflation-protected
securities may react differently from other fixed income securities to changes in interest rates. Because
interest rates on inflation-protected securities are adjusted for inflation, the values of these securities are not materially affected by inflation
expectations. Therefore, the value of inflation-protected securities are anticipated to change in response
to changes in “real” interest rates, which represent nominal (stated) interest rates reduced by the
expected impact of inflation. Generally, the value of an inflation-protected security will fall when
real interest rates rise and will rise when real interest rates fall.
|
| Inflation-Protected Securities Tax Risk |
Inflation-Protected
Securities Tax Risk: Any increase in the principal
amount of an inflation-protected security may be included for tax purposes in a fund’s gross income,
even though no cash attributable to such gross income has been received by a fund. In such event, a fund
may be required to make annual gross distributions to shareholders that exceed the cash it has otherwise
received. In order to pay such distributions, a fund may be required to raise cash by selling its investments.
The sale of such investments could result in capital gains to a fund and additional capital gain distributions
to shareholders. In addition, adjustments during the taxable year for deflation to an inflation-indexed
bond held by a fund may cause amounts previously distributed to shareholders in the taxable year as income
to be characterized as a return of capital, which could increase or decrease a fund’s ordinary income
distributions to shareholders, and may cause some of a fund’s distributed income to be classified as
a return of capital.
|
| Income Risk |
Income Risk: Income
risk is the risk that falling interest rates will cause a fund’s income to decline because, among other
reasons, the proceeds from maturing short-term securities in its portfolio may be reinvested in lower-yielding
securities.
|
| Call Risk |
Call Risk: Call
risk is the risk that during periods of falling interest rates, an issuer will call or repay a higher-yielding
fixed income security before its maturity date, forcing a fund to reinvest in fixed income securities
with lower interest rates than the original obligations.
|
| Derivatives Risk |
Derivatives
Risk: Derivatives are instruments, such as swaps, futures contracts, and options thereon,
and foreign currency forward contracts, whose value is derived from that of other assets, rates or indices.
Derivatives can be used for hedging (attempting to reduce risk by offsetting one investment position
with another) or non-hedging purposes. Hedging with derivatives may increase expenses, and there is no
guarantee that a hedging strategy will work. While hedging can reduce or eliminate losses, it can also
reduce or eliminate gains or cause losses if the market moves in a manner different from that anticipated
by a fund or if the cost of the derivative outweighs the benefit of the hedge. In regard to currency
hedging, it is generally not possible to precisely match the foreign currency exposure of such foreign
currency forward contracts to the value of the securities involved due to fluctuations in the market
values of such securities and cash flows into and out of a fund between the date a foreign currency forward
contract is entered into and the date it expires. The use of derivatives for non-hedging purposes may
be considered to carry more risk than other types of investments. When a fund uses derivatives, the fund
will be directly exposed to the risks of those derivatives. Derivative instruments are subject to a number
of risks including counterparty, settlement, liquidity, interest rate, market, credit and management
risks, as well as the risk of improper valuation. Changes in the value of a derivative may not correlate
perfectly with the underlying asset, rate or index, and a fund could lose more than the principal amount
invested. Additional risks are associated with the use of swaps including counterparty and credit risk
(the risk that the other party to a swap agreement will not fulfill its contractual obligations, whether
because of bankruptcy or other default) and liquidity risk (the possible lack of a secondary market for
the swap agreement). Credit risk increases when a fund is the seller of swaps and counterparty risk increases
when the fund is a buyer of swaps. In addition, where a fund is the seller of swaps, it may be required
to liquidate portfolio securities at inopportune times in order to meet payment obligations. Swaps may
be illiquid or difficult to value.
|
| Liquidity Risk |
Liquidity
Risk: Liquidity risk exists when particular portfolio investments
are difficult to purchase or sell. To the extent that a fund holds illiquid investments, the fund’s
performance may be reduced due to an inability to sell the investments at opportune prices or times.
Liquid portfolio investments may become illiquid or less liquid after purchase by a fund due to low trading
volume, adverse investor perceptions and/or other market developments. Liquidity risk includes the risk
that a fund will experience significant net redemptions at a time when it cannot find willing buyers
for its portfolio securities or can only sell its portfolio securities at a material loss or at increased
costs. Liquidity risk can be more pronounced in periods of market turmoil or in situations where ownership
of shares of a fund are concentrated in one or a few investors.
|
| Securities Lending Risk |
Securities Lending Risk: Securities lending involves
the risk that the borrower may fail to return the securities in a timely manner or at all. As a result,
a fund may lose money and there may be a delay in recovering the loaned securities. A fund could also
lose money if it does not recover the securities and/or the value of the collateral falls, including the value of investments made with cash collateral. Securities lending
also may have certain adverse tax consequences.
|
| Operational Risk |
Operational
Risk: Operational risks include human error, changes in personnel,
system changes, faults in communication, and failures in systems, technology, or processes. Various operational
events or circumstances are outside a fund’s or its advisor’s control, including instances at third
parties. A fund and its advisor seek to reduce these operational risks through controls and procedures.
However, measures that seek to reduce these operational risks through controls and procedures may not
address every possible risk and may be inadequate to address these risks.
|
| Cyber Security Risk |
Cyber Security Risk: A fund and its service
providers’ use of internet, technology and information systems may expose the fund to potential risks
linked to cyber security breaches of those technological or information systems. Cyber security breaches,
amongst other things, could allow an unauthorized party to gain access to proprietary information, customer
data, or fund assets, or cause the fund and/or its service providers to suffer data corruption or lose
operational functionality.
|
|