The makeup of the benchmark S&P 500 is set to change again soon. Getty Images Close Key Takeaways More changes are coming to a big U.S. index. Two companies are coming to the S&P 500, the benchmark U.S. market measure. Solstice Advance Materials is set to replace CarMax (KMX) before Friday's open, S&P Dow Jones Indices said late Monday, while Qnity Electronics will replace Eastman Chemical (EMN) before the start of trading next Tuesday. Solstice, which will use the ticker "SOLS," is arriving via spinoff fr ...

Honeywell and DuPont are hiving off companies in the coming days, and both are going into the S&P 500. ...