突然！金价、银价，大跌！原因找到了

Group 1 - The Chicago Mercantile Exchange (CME) has raised margin requirements for metal futures, including gold, silver, platinum, and lithium, due to recent rapid price increases and heightened volatility [1] - The margin for gold futures has been increased by 10%, silver by approximately 13.6%, and platinum by 23%, which will significantly raise the cost of speculative trading in the market [1] - Following the announcement, international metal futures prices experienced multiple rounds of declines, with gold prices falling below $4,500 per ounce [1] Group 2 - Historical instances show that CME's margin increases have previously led to significant declines in silver prices, such as in the 1980s and 2011, where silver prices dropped dramatically after margin hikes [2] - Analysts suggest that the current rise in silver prices is supported not only by its affordability as an investment but also by its irreplaceable role in industrial applications, highlighted by comments from notable figures like Elon Musk [2][4] - The gold-silver ratio has recently fallen to the range of 55 to 60, indicating that silver is becoming relatively more expensive compared to gold, which may lead to potential corrections in silver prices [6]