Dell, Palantir and Erie Indemnity to join S&P 500

The S&P Dow Jones Indices said on Friday server maker Dell Technologies, data analytics firm Palantir Technologies and property and casualty insurer Erie Indemnity will join the benchmark S&P 500 before the market opens on Sept. 23.
Shares of Palantir rose nearly 8 per cent in extended trading, while those of Dell and Erie rose 6 per cent and 3 per cent, respectively.
The three companies will replace American Airlines Group, online marketplace Etsy and diagnostics company Bio-Rad Laboratories in the index.
Shares of American Airlines were down 0.7 per cent, while those of Bio-Rad Laboratories and Etsy fell about 1 per cent.