U.S. education stocks tumbled Monday after Department of Education data on student loan repayments showed most for-profit schools would be ineligible for federal aid, spooking a sector concerned about increased regulatory scrutiny.

The S&P education services index dropped more than 6 percent to a 22-month low in an overall Nasdaq market that was up 0.4 percent. The sector saw blistering growth in much of last year as job seekers headed back to school to boost their employment prospects after the financial crisis. Get the full story »