US stocks today: S&P 500, Nasdaq edge lower as tech shares slide

US equity benchmarks closed marginally lower with the S&P 500 down 0.19 percent to 7,485 points and the Nasdaq slipping 0.65 percent on weakness in semiconductor and tech shares. Traders slightly trimmed US rate-hike expectations after Fed pick Warsh spoke, though at least one hike is still priced in for the year. Investors remained cautious ahead of the July 4 holiday, the key monthly US jobs report due Thursday, and ongoing US-Iran discussions over the Strait of Hormuz that pushed oil prices sharply higher.