A day in front of the July employment report, stocks plunged across the board Thursday on worries about the health of the global economy. The 512.76-point selloff was the 9th worst on record for the Dow, on a points basis, and all three of the major market indexes are now lower on the year.More headlines from FoxBusiness.com:http://email.foxnews.com/t?ctl=126BE:7469D46E31DAE9CA7296B2FBC51BECC6&--