沪金期货主力合约跌幅收窄至1.9%，早盘涨近5%

Group 1 - The core point of the news is that the main contract for Shanghai gold futures has seen a narrowing decline of 1.9% after an early morning increase of nearly 5% [1] Group 2 - The report indicates a significant fluctuation in the gold futures market, highlighting the volatility and potential trading opportunities [1]