NEW YORK, Oct. 7, 2024 /PRNewswire/ — DocuSign Inc. (NASD:DOCU) will replace MDU Resources Group Inc. (NYSE:MDU) in the S&P MidCap 400, and MDU Resources Group will replace Chuy’s Holdings Inc. (NASD:CHUY) in the S&P SmallCap 600 effective prior to the opening of trading on Friday,…