美国银行美股招股说明书(2026-04-17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 Buffered (with Memory Feature) Auto-Callable Yield Notes Fully and Unconditionally Guaranteed by Bank of America Corporation Linked to the Least Performing of the State Street®SPDR®S&P®Metals & Mining ETF and theVanEck®Gold Miners ETF• The Contingent Income Buffered (with Memory Feature) Auto-Callable Yield Notes Linked to the Least Performing of the State Street®SPDR®S&P®Metals & Mining ETF and the VanEck®Gold Miners ETF, due March 27, 2029 (the “Notes”) are expected to price on April 22, 2026 andexpected to issue on April 27, 2026.•Approximate 3 year term if not called prior to maturity.•Payments on the Notes will depend on the individual performance of the State Street®SPDR®S&P®Metals & Mining ETF and the VanEck®GoldMiners ETF (each an “Underlying”).•Contingent coupons payable monthly if the Observation Value ofeachUnderlying on the applicable Observation Date is greater than or equal to65.00% of its Starting Value, assuming the Notes have not been called. The coupon per $1,000.00 in principal amount of Notes payable on therelated Contingent Payment Date, if applicable, will equal (i) theproductof $6.667timesthe number of Contingent Payment Dates that haveoccurred up to the relevant Contingent Payment Date (inclusive of the relevant Contingent Payment Date)minus(ii) the sum of all ContingentCoupon Payments previously paid.•Beginning with the October 22, 2026 Call Observation Date, automatically callable monthly for an amount equal to the principal amount plus therelevant Contingent Coupon Payment, if the Observation Value of each Underlying is greater than or equal to 100.00% of its Starting Value on anyCall Observation Date.•Assuming the Notes are not called prior to maturity, ifeitherUnderlying declines by more than 20% from its Starting Value, at maturity yourinvestment will be subject to 1:1 downside exposure to decreases in the value of the Least Performing Underlying beyond a 20% decline, with upto 80% of the principal at risk; otherwise, at maturity, you will receive the principal amount. At maturity you will also receive a final ContingentCoupon Payment if the Observation Value ofeachUnderlying on the final Observation Date is greater than or equal to 65.00% of its StartingValue.•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. 09711QLQ4. The initial estimated value of the Notes as of the pricing date is expected to be between $850.00 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-12 of this pricing supplement and “Structuring the Notes” on page PS-28 of thispricing supplement 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-12 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 or disapproved 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 $970.00 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 $30.00, resulting in proceeds, before expenses, to BofA Finance of as low as $970.00 per $1,000.00 in principal amount of Notes.The Notes and the related guarantee: Selling Agent Contingent Income Buffered (with Memory Feature) Auto-Callable Yield Notes Linked to the Least Performing of the State Street®SPDR®S&P®Metals & Mining ETF and the VanEck®Gold Miners ETF Terms of the Notes Contingent Income Buffered (with Memory Feature) Auto-Callable Yield Notes Linked to the Least Performing of the State Street®SPDR®S&P®Metals & Mining ETF and the VanEck®Gold Miners ETF Contingent Income Buffered (with