NEW YORK, Aug. 16, 2023 /PRNewswire/ — Chesapeake Energy Corp. (NASD:CHK) will replace Mercury Systems Inc. (NASD: MRCY) in the S&P MidCap 400, and Mercury Systems will replace Arconic Corp. (NYSE: ARNC) in the S&P SmallCap 600 effective prior to the opening of trading on Monday, August…
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