美国银行美股招股说明书(2025-09-22版)

This pricing supplement, which is not complete and may be changed, relates to an effective Registration Statement under the Securities Act of 1933. This pricing supplement and theaccompanying product supplement, prospectus supplement and prospectus are not an offer to sell these Notes in any country or jurisdiction where such an offer would not be permitted. Linked to the Least Performing of the Nasdaq-100®Index, the Russell 2000®Index and the S&P 500®Index •The Fixed Income Issuer Callable Yield Notes Linked to the Least Performing of the Nasdaq-100®Index, the Russell 2000®Index and the S&P 500®Index, due November 3, 2026(the “Notes”) are expected to price on September 29, 2025 and expected to issue on October 2, 2025.•Approximate 13 month term if not called prior to maturity.•Payments on the Notes will depend on the individual performance of the Nasdaq-100®Index, the Russell 2000®Index and the S&P 500®Index (each an “Underlying”).•A fixed coupon rate of 10.55% per annum (0.8792% per month) payable monthly, assuming the Notes have not been called.•Beginning on January 2, 2026, callable monthly at our option for an amount equal to the principal amount plus the Fixed Coupon Payment.•Assuming the Notes are not called prior to maturity, ifanyUnderlying has declined by more than 30% from its Starting Value on any Trading Day during the Knock-In Period, and theEnding Value of the Least Performing Underlying is less than its Starting Value, at maturity your investment will be subject to 1:1 downside exposure to decreases in the value of theLeast Performing 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 the final FixedCoupon Payment regardless of the performance of the Least Performing Underlying.•The “Knock-In Period” will be the period from but excluding the pricing date to and including the Valuation Date.•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 of America Corporation (“BAC” or the“Guarantor”), as guarantor of the Notes.•The Notes will not be listed on any securities exchange.•CUSIP No. 09711MS78. The initial estimated value of the Notes as of the pricing date is expected to be between $935.00 and $985.00 per $1,000.00 in principal amount of Notes, which is less than thepublic offering price listed below.The actual value of your Notes at any time will reflect many factors and cannot be predicted with accuracy. See “Risk Factors” beginning on page PS-8of this pricing supplement and “Structuring the Notes” on page PS-23of this pricing supplement for additional information.There are important differences between the Notes and a conventional debt security. Potential purchasers of the Notes should consider the information in “Risk Factors” 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 ordetermined if this pricing supplement and the accompanying product supplement, prospectus supplement and prospectus is truthful or complete. Any representation to the contrary is acriminal offense. Certain dealers who purchase the Notes for sale to certain fee-based advisory accounts may forgo some or all of their selling concessions, fees or commissions. The public offeringprice for investors purchasing the Notes in these fee-based advisory accounts may be as low as $995.00 per $1,000.00 in principal amount of Notes. Fixed Income Issuer Callable Yield Notes Linked to the Least Performing of the Nasdaq-100®Index, the Russell 2000®Index and the S&P 500®Index Terms of the Notes Fixed Income Issuer Callable Yield Notes Linked to the Least Performing of the Nasdaq-100®Index, the Russell 2000®Index and the S&P 500®Index Fixed Income Issuer Callable Yield Notes Linked to the Least Performing of the Nasdaq-100®Index, the Russell 2000®Index and the S&P 500®Index Fixed Payment Dates and Call Payment Dates Fixed Income Issuer Callable Yield Notes Linked to the Least Performing of the Nasdaq-100®Index, the Russell 2000®Index and 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 Underlyings. The economic terms of the Notes arebased 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 hedgingarrangements BAC’s affiliates enter into. BAC’s internal funding rate is typically lower than the rate it would pay when it issues conventional fixed or floating rate debt securities. Thisdifference in funding rate, as well as the underwriting discount, if any, the referral fee and the hedging related charges described below (see “Risk Factors” beginning on page PS-8), willreduce the economic terms of the Notes