Stocks set out on mixed footing early Thursday after a spate of diverging jobs data. The Nasdaq rose 0.1%. The Dow Jones industrial average and the S&P 500 cooled a fraction each. Volume was up 28% on the Nasdaq, driven by Apple's (AAPL) fast trade, and dipped 13% on the NYSE compared with the same time Wednesday. Jobs data early Thursday sent mixed messages, with layoffs rising 34% in November, a third straight monthly advance, while weekly