Amazon (AMZN.O) U.S. shares extended after-hours gains to 10%.

上海黄金交易所黄金T+D 7月30日（周四）晚盘盘初上涨0.06%报879.67元/克； 上海黄金交易所白银T+D 7月30日（周四）晚盘盘初下跌0.67%报13990.0元/千克。

Deutsche Bank said the Fed’s decision to hold rates and limited detail from the Fed chair prompted a sharp steepening of the US Treasury yield curve, lifting the 30-year yield to 5.20% and pressuring equities. The S&P 500 posted its worst single-day drop in seven weeks, closing down 1.52% after wide intraday swings — down more than 0.5% ahead of the FOMC, briefly rallying during the chair’s press conference, then plunging in the final hour. Tech weakness, including a 5.33% collapse in the Philadelphia Semiconductor Index, dragged the Nasdaq-100 down 2.06% and into a technical correction, about 11.3% below its early-June peak. Asian and European markets were mixed.