NEW YORK, March 1, 2024 /PRNewswire/ -- S&P Dow Jones Indices ("S&P DJI") will make the following changes to the S&P 500, S&P 100, S&P MidCap 400, and S&P SmallCap 600 indices effective prior to the open of trading on Monday, March 18, to coincide with the quarterly rebalance. The changes ensure each index is more representative of its market capitalization range. All companies being added to the S&P 500 are more representative of the large-cap market space, all companies being added to the S&P MidCap 400 a ...