Fed talk of tapering nudges Wall Street down with FOMC minutes showing plans to pull back monthly bond purchases by year-end. The U.S. presses ahead with booster vaccines despite the WHO advising that poorer nations require the shots first. There are further quarterly earnings beats from U.S. retail and chip makers but Nvidia says cryptochip sales are soft and supply chain delays continue to cause concern. And in tech news, Robinhood revenues double in Q2, however the trading app says that activity is showing signs of slowing. 

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