Banco de Chile and its subsidiaries have defined a corporate framework for valuation and control related with the process to the fair value measurement.

Within the established framework includes the Product Control Unit, which is independent of the business areas and reports to the Financial Management Control and Division Manager. This function befalls to the Financial Control, Treasury and Capital Manager, through the Financial Risk Information and Control Section, is responsible for independent verification of price and results of trading (including derivatives) and investment operations and all fair value measurements.

To achieve the appropriate measurements and controls, the Bank and its subsidiaries, take into account at least the following aspects:

To value financial instruments, Banco de Chile uses industry standard modeling; quota value, share price, discounted cash flows and valuation of options through Black-Scholes-Merton, according to the case.

The input parameters for the valuation of fixed income instruments and options correspond to rates, prices and volatility levels for different terms and market factors that are traded in the national and international market and that are provided by the main sources of the market.

In the case of the valuation of derivatives under a CSA (Credit Support Annex Discounting) agreement, the rates used to discount the flows correspond to the CSA Discounting methodology, where the discount factors used depend on the collateral agreement that exists with each counterparty.

The fair value for instruments with quoted prices in active markets is determined using daily quotes from electronic systems information (such as Santiago Stock Exchange, Bloomberg, LVA and Risk America, etc.). This quote represents the price at which these instruments are regularly traded in the financial markets.

If no specific quotes are available for the instrument to be valued, valuation techniques will be used to determine the fair value.

Due to, in general, the valuation models require a set of market parameters as inputs, the aim is to maximize information based on observable or price-related quotations for similar instruments in active markets. To the extent there is no information in direct from the markets, data from external suppliers of information, prices of similar instruments and historical information are used to validate the valuation parameters.

Part of the fair value process considers three adjustments to the market value, calculated based on the market parameters, including; a Bid/Offer adjustment, an adjustment for derivative credit risk (CVA and DVA), and an adjustment for the funding of the derivative cash flows (FVA). Likewise, for certain fixed income instruments held in investment portfolios measured at fair value through other comprehensive income or at amortized cost, the portion of the fair value adjustment explained by impairment due to counterparty credit risk is determined.

In turn, the Bid/Offer adjustment, represents the impact on the valuation of an instrument depending on whether the position corresponds to a long (bought) or a short (sold). To calculate this adjustment is used the direct quotes from active markets or indicative prices or derivatives of similar assets depending on the instrument, considering the Bid, Mid and Offer, respectively. Finally, the adjustment made for CVA and DVA for derivatives corresponds to the credit risk recognition of the issuer, either of the counterparty (CVA) or of Banco de Chile (DVA). Similarly, the determination of credit risk impairment is determined based on the counterparty risk implicit in the instrument’s market rate. Finally, the FVA adjustment for derivatives corresponds to a value adjustment that reflects the expected cost (or benefit) of financing (reinvesting) the cash flows of the derivative, with respect to a reference discount rate, when there are no collaterals or this one is imperfect.

Bid/Offer adjustments are made for trading instruments and Financial instrument at fair value through Other Comprehensive Income. Adjustments for CVA / DVA/FVA/COLVA are carried out only for derivatives. For its part, credit risk impairment is computed only for fixed income instruments measured at fair value through other comprehensive income and fixed income instruments measured at amortized cost.

A process of independent verification of prices and interest rates is executed daily, in order to control that the market parameters used by Banco de Chile in the valuation of the financial instruments relating to the current state of the market and from them the best estimate derived of the fair value. The objective of this process is to control those the official market parameters provided by the respective business areas, before being entered into the valuation, are within acceptable ranges of differences when compared to the same set of parameters prepared independently by the Financial Risk Information and Control Section. As a result, value differences are obtained at the level of currency, product and portfolio. In the event significant differences exist, these differences are scaled according to the amount of individual materiality of each market factor and aggregated at the portfolio level, according to the grouping levels within previously defined ranges. These ranges are approved by the Finance, International and Financial Risk Committee.

Complementary and in parallel, the Financial Risk Information and Control Section generates and reports daily Profit and Loss (“P&L”) and Exposure to Market Risks, which allow for proper control and consistency of the parameters used in the valuation.

Cases, where there are no market quotations for the instrument to be valued and there are no prices for similar transactions instruments or indicative parameters, a specific control and a reasoned analysis must be carried out in order to estimate the fair value of the operation. Within the valuation framework described in the Reasonable Value Policy (and its procedure) approved by the Board of Directors of Banco de Chile, a required level of approval is set in order to carry out transactions where market information is not available, or it is not possible to infer prices or rates from it.

Banco de Chile and its subsidiaries, classify all the financial instruments among the following levels:

In this level, the following instruments are considered: currency futures, debt instruments issued by the Treasury and the Central Bank of Chile, which belong to benchmarks, mutual fund investments and equity shares.

For the instruments of the Central Bank of Chile and the General Treasury of the Republic, all those mnemonics belonging to a Benchmark, in other words corresponding to one of the following categories published by the Santiago Stock Exchange, will be considered as Level 1: Pesos-02, Pesos-03, Pesos-04, Pesos-05, Pesos-07, Pesos-10, Pesos-20, UF-02, UF-03, UF-04, UF-05, UF-07, UF-10, UF-20, UF-30. A Benchmark corresponds to a group of mnemonics that are similar in duration and are traded in an equivalent way, i.e., the price (return internal rates in this case) obtained is the same for all the instruments that make up a Benchmark. This feature defines a greater depth of market, with daily quotations that allow classifying these instruments as Level 1.

In the case of debt issued by the Chilean Government, the internal rate of return of the market is used to discount all flows to present value. In the case of mutual funds and equity shares, the current market price per share, which multiplied by the number of instruments results in the fair value.

The preceding described valuation methodology is equivalent to the one used by the Santiago Stock Exchange and correspond to the standard methodology used in the market.

At this level there are mainly derivatives instruments, debt issued by banks, debt issues of Chilean and foreign companies, issued in Chile or abroad, mortgage claims, financial brokerage instruments and some issuances by the Central Bank of Chile and the General Treasury of the Republic, which do not belong to benchmarks.

The technique used for derivative valuation depends on whether the instrument is impacted by volatility as a relevant market factor. Accordingly, for options, the Black-Scholes-Merton formula is applied, as it incorporates volatility, whereas for other derivatives, such as forwards and swaps, the discounted cash flow method is used.

For the remaining instruments at this level, as for debt issues of level 1, the valuation is done through cash flows model by using an internal rate of return that can be derived or estimated from internal rates of return of similar securities as mentioned above.

If there is no observable price for an instrument in a specific term, the price will be inferred from the interpolation between periods that have observable quoted price in active markets. These models incorporate various market variables, including the credit quality of counterparties, exchange rates and interest rate curves.

Valuation Techniques and Inputs for Level 2 Instrument:

Level 3: These are financial instruments whose fair value is determined using unobservable inputs data neither for the assets or liabilities under analysis nor for similar instruments. An adjustment to an input that is significant to the entire measurement can result in a fair value measurement classified within Level 3 of the fair value hierarchy, if the adjustment uses significant unobservable inputs.

The instruments likely to be classified as level 3 are mainly Corporate Debt by Chilean and foreign companies, issued both in Chile and abroad.

Valuation Techniques and Inputs for Level 3 Instrument:

The following table shows the classification by levels, for financial instruments measured at fair value.

The following table shows the reconciliation between the balances at the beginning and at the end of year for those instruments classified in Level 3, whose fair value is reflected in the Consolidated Financial Statements:

The following table shows the sensitivity, by type of instrument, of those instruments classified in Level 3 using alternative in key valuation assumptions:

With the purpose of determining the sensitivity of the financial investments to changes in significant market factors, the Bank has made alternative calculations at fair value, changing those key parameters for the valuation and which are not directly observable in screens. For financial assets in the table above, which correspond to Bank Bonds and Corporate Bonds, it was considered that, since there are no current observables prices, the input prices will be based on brokers’ quotes. The prices are usually calculated as a base rate plus a spread. For Local Bonds it was determined to apply a 10% impact on the price. The 10% impact is considered reasonable, taking into account the market performance of these instruments and comparing it against the bid/offer adjustment that is provisioned by these instruments.

The following table summarizes the fair values of the Bank’s main financial assets and liabilities that are not recorded at fair value in the Statement of Financial Position. The values shown in this note are not attempt to estimate the value of the Bank’s income-generating assets, nor forecast their future behavior. The estimated fair value is as follows:

Other financial assets and liabilities not measured at their fair value, but for which a fair value is estimated, even if not managed based on such value, include assets and liabilities such as placements, deposits and other time deposits, debt issued, and other financial assets and obligations with different maturities and characteristics. The fair value of these assets and liabilities is calculated using the Discounted Cash Flow model and the use of several data sources such as yield curves, credit risk spreads, etc. In addition, due to the fact that some of these assets and liabilities are not traded on the market, regular reviews and analyzes are required to determine the suitability of the inputs and fair values determined.

The table below sets forth the fair value of Financial Assets and Liabilities not measured at fair value on the balance sheet, for the years ended December 31, 2025 and 2024:

The Bank determines the fair value of these assets and liabilities according to the following: