NEW YORK, March 15, 2023 /PRNewswire/ — S&P Dow Jones Indices will make the following changes to the S&P MidCap 400 and S&P SmallCap 600: CVR Energy Inc. (NYSE: CVI) will replace Atlas Air Worldwide Holdings Inc. (NASD: AAWW) in the S&P SmallCap 600 effective prior to the opening of…