Two Chinese fintech and a U.S. fintech dominated the biggest financial gainers this week as the financial sector essentially treaded water and the broader S&P 500 edged up 1%. The biggest decliners were all companies that reported earnings during the week. Hong Kong-based Futu Holdings (NASDAQ:FUTU) jumped 26% in the week ended July 28, making it the stock that logged the biggest increase among financial stocks with market cap over $2B. Chinese tech stocks rallied on Friday as Beijing signaled some willingness to enact policies to support tech growth. Upstart Holdings (NASDAQ:UPST), the U.S. company that offers a lending platform…