纽约证券交易所：12月中旬空头头寸增加1.9%，至194.7亿股。

Group 1 - The core point of the article is that short positions on the New York Stock Exchange increased by 1.9% in mid-December, reaching 19.47 billion shares [1] Group 2 - The increase in short positions indicates a growing bearish sentiment among investors [1] - The total short positions now stand at 19.47 billion shares, reflecting a significant level of market pessimism [1] - This trend may suggest potential volatility in the market as investors hedge against declines [1]