香港恒生指数5月15日（周四）收盘下跌187.49点，跌幅0.79%，报23453.16点；香港恒生科技指数5月15日（周四）收盘下跌83.94点，跌幅1.56%，报5297.84点；国企指数5月15日（周四）收盘下跌83.4点，跌幅0.97%，报8509.67点；红筹指数5月15日（周四）收盘下跌14.66点，跌幅0.38%，报3854.27点。

Market Performance Summary - The Hang Seng Index closed at 23,453.16 points on May 15, down by 187.49 points, a decline of 0.79% [1] - The Hang Seng Tech Index closed at 5,297.84 points, decreasing by 83.94 points, representing a drop of 1.56% [1] - The National Enterprises Index ended at 8,509.67 points, down by 83.4 points, which is a decrease of 0.97% [1] - The Red Chip Index closed at 3,854.27 points, falling by 14.66 points, a decline of 0.38% [1]