交易所再出手，调整交易限额、涨停板

Group 1 - The Shanghai Futures Exchange (SHFE) has tightened trading limits for silver and tin futures contracts while adjusting the price fluctuation limits and margin ratios for copper and aluminum futures [1][2][6] - The maximum number of contracts for intraday opening trades has been set to 800 for silver futures and 200 for tin futures, effective from January 27, 2026 [2][4] - Recent price surges in silver and tin futures have prompted these adjustments, with silver reaching a peak of 28,226 yuan per kilogram, a rise of over 14%, and tin hitting 462,720 yuan per ton [4] Group 2 - The price fluctuation limit for copper and aluminum futures will be adjusted to 9%, with margin ratios set at 10% for hedging and 11% for general positions, effective from January 28, 2026 [6][11] - As of January 26, copper futures closed at 101,880 yuan per ton, up 1.26%, while aluminum futures closed at 24,215 yuan per ton, up 0.33% [11][12] - The long-term outlook for copper prices remains positive due to strong demand from sectors like energy storage and AI, despite potential volatility [11][12]