黄金白银价格崩盘之后，交易所上调了保证金

Group 1 - The core viewpoint of the articles is that following significant declines in gold and silver prices, exchanges have raised margin requirements for futures contracts to ensure adequate collateral coverage [1][2]. Group 2 - On January 31, the Chicago Mercantile Exchange announced an increase in margin requirements for Comex gold and silver futures, with non-high-risk gold contracts rising from 6% to 8% and high-risk contracts from 6.6% to 8.8% [1]. - For silver futures, non-high-risk contracts' margin will increase from 11% to 15%, while high-risk contracts will rise from 12.1% to 16.5% [1]. - The adjustments will take effect after the market closes on the following Monday, as part of a routine review of market volatility [1]. Group 3 - Earlier in the week, the exchange had already raised margin requirements for silver, platinum, and palladium futures following rapid price increases [2]. Group 4 - The Shanghai Futures Exchange announced adjustments to the price fluctuation limits and margin ratios for silver futures, effective from February 3, 2026, with fluctuation limits increasing from 16% to 17% and margin ratios for hedging rising from 17% to 18% [3][5]. - The general margin ratio for holding positions will increase from 18% to 19% [3][5].