美国银行美股招股说明书(2026-03-25版)

Preliminary Pricing Supplement - Subject to Completion(To Prospectus dated December 8, 2025,Series A Prospectus Supplement dated December 8, 2025 andProduct Supplement EQUITY-1 dated December 8, 2025) Contingent Income Issuer Callable Yield Notes Fully and Unconditionally Guaranteed by Bank of America Corporation Linked to the S&P 500®Index•The Contingent Income Issuer Callable Yield Notes Linked to the S&P 500® Index, due April 20, 2029 (the “Notes”) are expected to price on April17, 2026 and expected to issue on April 22, 2026.•Approximate 3 year term if not called prior to maturity.•Payments on the Notes will depend on the performance of the S&P 500®Index (the “Underlying”).•Contingent coupon rate of 7.50% per annum (3.75% semi-annually) payable semi-annually if the closing level of the Underlying on the applicableObservation Date is greater than or equal to 70.00% of its Starting Value, assuming the Notes have not been called.•Beginning on October 22, 2026, callable semi-annually at our option for an amount equal to the principal amount plus the relevant ContingentCoupon Payment, if otherwise payable.•Assuming the Notes are not called prior to maturity, if the Underlying declines by more than 30% from its Starting Value, at maturity yourinvestment will be subject to 1:1 downside exposure to decreases in the value of the Underlying, with up to 100% of the principal at risk; otherwise,at maturity, you will receive the principal amount. At maturity you will also receive a final Contingent Coupon Payment if the closing level of theUnderlying on the final Observation Date is greater than or equal to 70.00% of its Starting Value.•All payments on the Notes are subject to the credit risk of BofA Finance LLC (“BofA Finance” or the “Issuer”), as issuer of the Notes, and Bank ofAmerica Corporation (“BAC” or the “Guarantor”), as guarantor of the Notes.•The Notes will not be listed on any securities exchange.•CUSIP No. 09711QL84. The initial estimated value of the Notes as of the pricing date is expected to be between $920.00 and $970.00 per $1,000.00 in principal amountof Notes, which is less than the public offering price listed below.The actual value of your Notes at any time will reflect many factors and cannot bepredicted with accuracy. See “Risk Factors” beginning on page PS-9 of this pricing supplement and “Structuring the Notes” on page PS-17 of this pricingsupplement for additional information. There are important differences between the Notes and a conventional debt security. Potential purchasers of the Notes should consider theinformation in “Risk Factors” beginning on page PS-9 of this pricing supplement, page PS-3 of the accompanying product supplement, pageS-7 of the accompanying prospectus supplement, and page 7 of the accompanying prospectus. None of the Securities and Exchange Commission (the “SEC”), any state securities commission, or any other regulatory body has approved ordisapproved of these securities or determined if this pricing supplement and the accompanying product supplement, prospectus supplement andprospectus is truthful or complete. Any representation to the contrary is a criminal offense. (1)Certain dealers who purchase the Notes for sale to certain fee-based advisory accounts may forgo some or all of their selling concessions, fees orcommissions. The public offering price for investors purchasing the Notes in these fee-based advisory accounts may be as low as $985.00 per$1,000.00 in principal amount of Notes. (2)The underwriting discount per $1,000.00 in principal amount of Notes may be as high as $15.00, resulting in proceeds, before expenses, to BofAFinance of as low as $985.00 per $1,000.00 in principal amount of Notes.(3)In addition to the underwriting discount above, if any, an affiliate of BofA Finance will pay a referral fee of up to $6.00 per $1,000.00 in principal amount of the Notes in connection with the distribution of the Notes to other registered broker-dealers. Selling Agent Contingent Income Issuer Callable Yield Notes Linked to the S&P 500®Index Terms of the Notes Contingent Income Issuer Callable Yield Notes Linked to the S&P 500®Index Observation Dates, Contingent Payment Dates and Call PaymentDates Contingent Income Issuer Callable Yield Notes Linked to the S&P 500®Index Any payments on the Notes depend on the credit risk of BofA Finance, as Issuer, and BAC, as Guarantor, and on the performance of the Underlying.The economic terms of the Notes are based on BAC’s internal funding rate, which is the rate it would pay to borrow funds through the issuance ofmarket-linked notes, and the economic terms of certain related hedging arrangements BAC’s affiliates enter into. BAC’s internal funding rate is typicallylower than the rate it would pay when it issues conventional fixed or floating rate debt securities. This difference in funding rate, as well as theunderwriting discount, if any, the referral fee and the hedging related charges described below (s