黄金盘中创12年来最大单日跌幅，热门中概股普跌，加密货币超17万人爆仓

Market Overview - On October 21, US stock indices closed mixed, with the Dow Jones reaching a historical high, the S&P 500 flat, and the Nasdaq slightly down [1] - The Dow Jones increased by 218.16 points (+0.47%), while the Nasdaq fell by 36.87 points (-0.16%) and the S&P 500 rose by 0.22 points (0.00%) [2] Technology Stocks Performance - Major tech stocks showed mixed results, with Amazon rising over 2%, while Google and Tesla fell over 2% and 1%, respectively [2] - Notable declines in Chinese concept stocks included Daqo New Energy down over 5% and Alibaba down 3.92% [3] Precious Metals Market - International gold and silver prices saw significant declines, with the Philadelphia Gold and Silver Index dropping by 9.57% and spot gold falling over 6%, marking the largest single-day drop since April 2013 [4] - COMEX gold futures fell by 5.07%, and COMEX silver futures dropped by 6.27% [4] Cryptocurrency Market - Multiple cryptocurrencies experienced sharp declines, with over 170,000 individuals facing liquidation, totaling over $700 million [4][6] - Bitcoin was priced at $109,132.1, down 1.29%, while Ethereum was at $3,898.49, down 2.09% [5] Investor Sentiment - A recent Bank of America survey indicated that 43% of investors view "going long on gold" as the most crowded trade, surpassing the 39% for "going long on the seven major US stocks" [7] - This sentiment suggests that gold is seen as a widely favored safe-haven asset, but it also indicates potential overvaluation concerns in the gold market [7]