Mazda stock dived nearly 7% after the struggling car maker said it will raise about two billion US dollars from selling new shares to invest in assembly plants and developing new vehicle technologies.

Wrestling for the front-runner's mantle in the Republican presidential race, Rick Santorum and Mitt Romney clashed fiercely Wednesday night over their conservative credentials and their past support of earmarks as the four GOP candidates met for the first debate in nearly a month.

CardioNet, Inc., a leading wireless medical technology company with a current focus on the diagnosis and monitoring of cardiac arrhythmias, today reported results for the fourth quarter and full year-ended December 31, 2011.

U.S. Rep. Virginia Foxx , R-N.C., filed Wednesday to seek a fifth term representing the 5th Congressional District.