美股盘前造纸和包装企业的股票下跌，国际纸业股价下跌5.3%

Group 1 - The core viewpoint of the article highlights a decline in stock prices for paper and packaging companies in the U.S. market on February 23 [1] Group 2 - International Paper's stock price decreased by 5.3% [1] - Smurfit's U.S.-listed stock fell by 6.4% [1]