Investing.com -- S&P Dow Jones Indices announced a sweeping overhaul of its benchmark tracking on Friday, propelling several technology and industrial firms into the prestigious S&P 500. Shares of Vertiv Holdings Co (NYSE:VRT) surged 5.6% in after-hours trading following the news, while EchoStar Corporation (NASDAQ:SATS) and Lumentum Holdings Inc (NASDAQ:LITE) also saw significant gains. The quarterly reshuffle is designed to maintain the integrity of the market’s most-watched gauges. S&P DJI st