Wall Street falls as health, tech stocks drag

U.S. stocks were lower in early afternoon trading on Thursday, dragged down by health and tech stocks, and as investors awaited the crucial monthly jobs report. The report is expected to show an addition of 190,000 jobs, compared with 151,000 in January. While concerns linger over the state of the global economy, upbeat data from major economies this week and signs of a rebound in commodity prices have helped ease some of those worries.