Comfort Systems (NYSE:FIX) is one of the 10 Data Center Cooling Companies to Invest In . On December 5, Comfort Systems was selected to become a part of the S&P 500 index. The news came after the quarterly rebalancing of the index, meaning FIX will now be included in the S&P 500 index before the market opens on December 22. The company is one of three tickers that will replace LKQ Corp. (NASDAQ:LKQ), Mohawk Industries Inc.(NYSE:MHK), and Solstice Advanced Materials Inc. (NASDAQ:SOLS). According to a Dece ...