S&P Global announces that Dell and Palantir will join the S&P 500, effective on September 23, 2024; DELL jumps 5%+ and PLTR jumps 7%+ after hours (Jordan Novet/CNBC)

Jordan Novet / CNBC:
S&P Global announces that Dell and Palantir will join the S&P 500, effective on September 23, 2024; DELL jumps 5%+ and PLTR jumps 7%+ after hours  —  Dell and Palantir shares both surged in extended trading on Friday after S&P Global announced that the two technology companies would join the S&P 500 U.S. stock index.