8:15 a.m. Update: Stock futures pointed to a slightly higher open Monday as Wall Street looks to rebound from the prior session's sell-off. S&P 500 futures rose 3.10 points and were above fair value. Dow futures gained 39 points, while Nasdaq futures added 7.50 points. On Friday the major indexes all turned south despite a day of solid corporate earnings and upbeat housing data. The NYSE shed 1.6%, the S&P 500 1.3%,