美国银行美股招股说明书(2026-03-20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) Dual Directional Buffered Notes Fully and Unconditionally Guaranteed by Bank of America Corporation Linked to the Least Performing of the Nasdaq-100®Index and the S&P 500®IndexThe Dual Directional Buffered Notes Linked to the Least Performing of the Nasdaq-100®Index and the S&P 500® •Index, due August 27,2027 (the “Notes”) are expected to price on March 24, 2026 and expected to issue on March 27, 2026.•Approximate 17 month term.•Payment on the Notes will depend on the individual performance of the Nasdaq-100®Index and the S&P 500®Index (each an“Underlying”).•If the Ending Value of each Underlying is greater than or equal to 100% of its Starting Value, at maturity, you will receive 100.00% upsideexposure to increases in the value of the Least Performing Underlying, subject to the Max Return of 32.15%.•IftheEnding Value of either Underlying is less than its Starting Value but the Ending Value ofeachUnderlying is greater than or equal to90% of its Starting Value, at maturity, you will receive a positive return equal to the absolute value of the percentage decline in the EndingValue of the Least Performing Underlying from its Starting Value to its Ending Value.•However, if the value ofeitherUnderlying declines by more than 10% from its Starting Value to its Ending Value, at maturity yourinvestment will be subject to 1:1 downside exposure to decreases in the Ending Value of the Least Performing Underlying beyond a 10%decline, with up to 90% of the principal at risk.•Any payment on the Notes is subject to the credit risk of BofA Finance LLC (“BofA Finance” or the “Issuer”), as issuer of the Notes, andBank of America Corporation (“BAC” or the “Guarantor”), as guarantor of the Notes.•No periodic interest payments.•The Notes will not be listed on any securities exchange.•CUSIP No. 09711QV91. The initial estimated value of the Notes as of the pricing date is expected to be between $930.00 and $980.00 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-6 of this pricing supplement and “Structuring the Notes” on page PS-18 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-6 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)(1)(2) (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 $997.50 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 $2.50, resulting in proceeds, before expenses, to BofA Finance of as low as $997.50 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 $8.75 per $1,000.00 in principalamount of the Notes in connection with the distribution of the Notes to other registered broker-dealers. Selling Agent Dual Directional Buffered Notes Linked to the Least Performing of the Nasdaq-100®Index and the S&P 500®Index Terms of the Notes Dual Directional Buffered Notes Linked to the Least Performing of the Nasdaq-100®Index and the S&P 500®Index * Subject to change. Payment on the Notes depends on the credit risk of BofA Finance, as Issuer, and BAC, as Guarantor, and on the performance of each Underlying. Theeconomic 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 of market-linked notes, and the economic terms of certain related hedging arrangements BAC’s affiliates enter into. BAC’s internal funding rate is typically lowerthan the rate it would pay when it issues conventional fixed or floating rate debt securities. This difference in funding rate, as well as the underwritingdiscount, if any, the referral fee and the hedging related charges d