Core Viewpoint - The Shanghai Gold Exchange has announced adjustments to margin requirements and price fluctuation limits for various gold and silver contracts, effective from December 30, 2025 [1] Group 1: Margin Adjustments - The margin ratio for Au, mAu, NYAuTN06, and NYAuTN12 contracts will increase from 16% to 17% [1] - The margin ratio for Ag contracts will rise from 19% to 20% [1] - The margin for CAu99.99 contracts will change from 85,000 yuan per lot to 120,000 yuan per lot [1] Group 2: Price Fluctuation Limits - The price fluctuation limit for gold contracts will be adjusted from 15% to 16% starting the next trading day [1] - The price fluctuation limit for silver contracts will increase from 18% to 19% starting the next trading day [1]