S&P Dow Jones Indices Announces Changes to S&P 500, S&P MidCap 400, and S&P SmallCap 600

S&P Dow Jones Indices has announced changes to the S&P 500, S&P MidCap 400, and S&P SmallCap 600. Ciena Corp. will join the S&P 500, replacing Dayforce Inc. Arrowhead Pharmaceuticals Inc. will join the S&P MidCap 400, replacing Ciena, while ADT Inc. will join the S&P SmallCap 600, replacing Arrowhead Pharmaceuticals. OneSpaWorld Holdings Ltd. will replace Dynavax Technologies Corp. in the S&P SmallCap 600.