U.S. stock market opens, Dow down 0.19%, S&P 500 down 0.15%, Nasdaq down 0.14%. Pinduoduo (PDD.O) opens down 1.08%, after the company's Q2 revenue exceeded expectations, with pre-market stock price once rising over 10%. Popular Chinese concept stocks generally rise, NIO (NIO.N) up 5.46%, Alibaba (BABA.N) up 1.94%. #美联储降息预期 $BTC $ETH