“The next six months, the industry, all of the folks that are out there trying to solve this problem, they are going to be very busy,” said Mark Fleming, chief economist for First American CoreLogic, a California research firm. “There are a lot of people facing their resets right now. A good share of them don’t have the refinance option.” Nationally, the number of subprime adjustable-rate loans resetting peaked at 7.6 percent of the loans outstanding last month, according to data from CoreLogic. More than 300,000 such loans will adjust this summer. CoreLogic’s data covers about 80 percent of the mortgage market.