Online lender Klarna Group (KLAR) made its market debut this morning, with the stock opening at $52, firmly above the initial public offering (IPO) price of$40 per share. Buzz around the "buy now, pay later" company's first session is weighing on fintech peers, with Upstart Holdings Inc (NASDAQ:UPST) and Affirm Holdings Inc (NASDAQ:AFRM) shares facing pressure.Upstart Stock Could Snap Win StreakUPST is down 10.4% at $61.75 at last check, on its way to snap a four-day win streak. While the equity still spor ...