白银期货暴涨9%，白银基金暂停申购，上期所大幅收紧交易限额

Group 1 - The core viewpoint of the article highlights the significant increase in silver prices, with spot silver rising over 5% to $109.37 per ounce and COMEX silver futures increasing by more than 7%, peaking at a 9% rise during trading [2][4]. - The Shanghai Futures Exchange (SHFE) has implemented stricter trading limits for silver and tin futures, with a maximum of 800 contracts allowed for intraday opening positions for specific silver futures contracts starting January 27, 2026 [5][6]. - Additionally, the SHFE has adjusted the price fluctuation limits and margin requirements for copper and aluminum futures, with the price fluctuation limit set at 9% and the margin requirement for general positions at 11% [6]. Group 2 - The SHFE has announced regulatory measures against 16 clients suspected of failing to declare actual control relationships in silver and tin futures trading, imposing a one-month restriction on opening positions and withdrawals for these clients [8]. - A specific account group was found to exceed the intraday opening trading volume limits, leading to regulatory actions against them as per the SHFE's abnormal trading behavior management rules [10].