Group 1 - The core point of the article is that American Comfort Systems (FIX.US) will be added to the S&P 500 index during the quarterly adjustment at the end of December, leading to a pre-market increase of over 2% in its stock price, reaching $1022.1 [1] Group 2 - The inclusion in the S&P 500 index is expected to enhance the company's visibility and potentially attract more institutional investors [1] - The stock price movement indicates positive market sentiment regarding the company's future prospects following the announcement [1] - The adjustment to the S&P 500 index reflects the company's growth and stability within the heating and ventilation industry [1]

供暖与通风公司美国舒适系统(FIX.US)盘前涨超2%，报1022.1美元。消息面上，该公司将被纳入标普 500指数成分股，将在12月底进行季度调整时加入该基准指数。 ...