Amazon partners with Affirm to roll out monthly installments for purchases over $50 to some US customers; Affirm stock is up 50%+ after hours (Kate Rooney/CNBC)

 Kate Rooney / CNBC: Amazon partners with Affirm to roll out monthly installments for purchases over $50 to some US customers; Affirm stock is up 50%+ after hours  —  – Affirm’s buy now, pay later...