深夜黄金大跳水，白银暴跌26%，现货黄金跌破4900美元！美股全线下跌，美元飙升！美国宣布对伊朗最新制裁

Group 1: Market Overview - The dollar experienced its largest single-day increase since July 2025, while gold and silver prices plummeted, leading to a sell-off in the commodity currency market [1][2] - The three major U.S. stock indices all declined, with the Dow Jones Industrial Average falling by 0.36%, the S&P 500 down by 0.43%, and the Nasdaq Composite dropping by 0.94% [5] Group 2: Precious Metals Performance - Silver prices saw a dramatic drop, with a maximum intraday decline of 36%, closing at $85.259 per ounce, a decrease of 26.42%, returning to levels seen around January 13 [3] - Gold prices fell over 12% at one point, hitting a low of below $4,700 per ounce, and ultimately closing at $4,880.034 per ounce, down 9.25%, reverting to prices around January 22 [3][4] - This sell-off resulted in silver recording its largest single-day drop ever, while gold experienced its most significant decline since the early 1980s, indicating a halt in the upward trend [4] Group 3: Economic Factors Influencing Gold Prices - Citigroup noted that gold investment is supported by various geopolitical and economic risks, but about half of these risks may dissipate later this year [4] - Key risk factors supporting gold demand include concerns over U.S. government debt and uncertainties surrounding AI, which could keep gold prices above historical averages [4] - The potential confirmation of Trump's nominee for the Federal Reserve Chair could further affirm the Fed's political independence, which is viewed as a negative factor for gold prices in the medium term [4]