Palantir, Dell Technologies, Erie Indemnity to be added to S&P 500 on 9/23

Palantir Technologies (PLTR), Dell Technologies (DELL), and Erie Indemnity Co. (ERIE) will replace American Airlines Group (AAL), Etsy (ETSY) and Bio-Rad Laboratories (BIO) in the S&P 500, respectively, prior to the open of trading on Monday, September 23.