Futures contracts tied to major stock indexesjumped in early trading Fridayas Wall Street is set to rebound for a second day after starting the week with big losses. Dow Jones Industrial Average futures climbed 150 points. S&P 500 futures gained 0.6%. Futures on the tech-heavy Nasdaq 100 Index, the relative underperformer this week, popped 1%.All three benchmarks are still on pace to post sharp losses for the week, with the Dow down 2.2% and the S&P shedding 2.8%. Tech stocks have been hit espe