美国天然气三日暴涨63%后急跌，单周涨幅仍有望创1990年以来新高

Group 1 - The core viewpoint of the articles highlights the significant fluctuations in U.S. natural gas futures, driven by extreme winter weather and market reactions to supply and demand dynamics [1][4][5] Group 2 - Natural gas prices surged due to expected below-normal temperatures across much of the U.S., likely increasing consumption and reducing inventory levels [4] - Concerns about water freezing in pipelines in southern gas-producing states have emerged, which could disrupt natural gas production starting this weekend [4] - Hedge funds with bearish positions were forced to cover their shorts, leading to a temporary spike in natural gas prices, with prices exceeding $5.50 per million British thermal units on Thursday [4] - Despite a price drop on Friday, the fundamentals for natural gas remain tight, with February futures trading significantly above March contracts [4] - The U.S. Energy Information Administration (EIA) reported that the decline in natural gas inventories is exceeding market expectations, indicating strong consumption capabilities [4] - Analysts predict that the upcoming extreme cold weather may lead to the second-largest weekly inventory draw on record [5]