Stock futures quickly pared losses after a positive November payrolls report, but still pointed to a mixed open Friday. Dow futures reversed early losses and gained 30 points. Nasdaq 100 futures also shifted into the black, gaining 7.75 points. S&P 500 futures were steady, with a 3.6 point loss. The Nasdaq and the S&P 500 ended Thursday with narrow losses so far for the week. The Dow will start Friday with a narrow weekly gain. Nonfarm employers