Multiple closely watched mortgage rates trended upward today. The average rates on 30-year fixed and 15-year fixed mortgages both trended upward. The average rate on 5/1 adjustable-rate mortgages, meanwhile, also ticked up. Rates for mortgages are in a constant state of flux, but they remain much lower overall than they were before the Great Recession. If you’re in the market for a mortgage, it could make sense to lock if you see a rate you like. Just make sure you’ve looked around for the best rate first.