The FinTech IPO Index gained 4.2% as stocks reached new highs in the holiday-shortened trading week.
BILL announced the launch of BILL Supplier Payments Plus to aid large suppliers in processing payments efficiently.
Affirm shares rose after forming a partnership with video game commerce firm Xsolla to offer pay-over-time options to game developers.
Sezzle introduced new features to assist customers amid financial pressures, while Circle Internet Group applied for a national trust charter to establish a digital currency bank.