U.S. stock market opens, Dow Jones down 0.19%, S&P 500 down 0.15%, Nasdaq down 0.14%. Pinduoduo (PDD.O) opens down 1.08%, after the company's second-quarter revenue exceeded expectations, pre-market stock price once surged over 10%. Popular Chinese concept stocks generally rise, NIO (NIO.N) up 5.46%, Alibaba (BABA.N) up 1.94%. $BTC $ETH

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