全球资产深夜大跌，美股半导体股下挫，白银失守72美元，比特币跌破6.7万美元

Market Overview - The U.S. stock market experienced a decline, with all three major indices falling, and the Nasdaq Composite Index dropping by 1% [1] - The Chicago Board Options Exchange Volatility Index (VIX), known as the "fear index," reached 22.50, up from around 17 at the beginning of the previous week [1] - The Philadelphia Semiconductor Index led the decline in technology stocks, with notable drops from companies such as Advanced Micro Devices (over 5%), Intel, and Micron Technology (nearly 4%) [1] - The "Big Seven" tech stocks have collectively fallen by 7.2% year-to-date [1] Gold and Silver Market - Gold-related stocks saw a decline, with Harmony Gold down 6%, K92 Mining down 4.6%, and Pan American Silver down 4.4% [2] - International gold prices fell sharply, with spot gold dropping below $4,850 and spot silver also falling below $72, marking new lows since February 6 [3] - The London gold price decreased by 2.55% year-to-date, while London silver fell by 5.11% [4] Oil and Gas Market - International oil and gas prices experienced a significant drop, with WTI crude oil and ICE Brent crude oil both falling nearly 2%, and U.S. natural gas futures dropping by 6% [4] Cryptocurrency Market - Bitcoin fell below $67,000, with a daily decline of 2.9%, and approximately 77,000 traders faced liquidation in the global market [5] Geopolitical Developments - Positive developments in U.S.-Iran negotiations were reported, with Iranian Foreign Minister Amir-Abdollahian stating that progress has been made [5][7] - The U.S. Federal Reserve's interest rate outlook has shifted, with Chicago Fed President Goolsbee indicating that further rate cuts may occur if inflation continues to decline [7]