Stocks edged slightly higher after a dull open on Friday as investors digested disappointing manufacturing and consumer sentiment data. Solar, oil drilling and fertilizer stocks continued to boast the day's biggest gains. The Dow Jones industrial average is up less than 2 points while the Nasdaq edged up 1 point. The S&P 500, down 0.2% early, rebounded to a 0.1% gain by lunchtime. Volume figures were not immediately available. The Federal Reserve