Key TakeawaysAffirm Holdings shares gained Tuesday when Apple announced that the fintech firm's buy now, pay later loans would be available to users of Apple Pay.The tech giant explained that Affirm's BNPL would be available along with other updated Apple services in the fall.Affirm said teaming with Apple provides its users additional payment choices and gives them the benefits of Apple Pay. Affirm Holdings (AFRM) shares jumped Tuesday after Apple (AAPL) announced the company’s buy now, pay later (BNPL) lo ...