Mortgage rates rose this week, with fixed-rate loans increasing 0.06 percentage points and adjustable-rate deals going up 0.03 percentage points, the Federal Home Loan Mortgage Corp. reported. The agency, which buys mortgages from lenders and packages them as securities for sale to investors, said fixed-rate loans reached 10.99% this week from 10.93% the week before. Adjustable-rate mortgages hit 7.99%, up from 7.96% last week. The fixed-rate average is for a 30-year loan covering 80% of a home's cost. The average adjustable-rate mortgage also is for 30% years, but for 75% of the home price.