Average long-term U.S. mortgage rates fell this week for a fourth straight week amid persisting turmoil in stock markets and global economic worries.

Average long-term U.S. mortgage rates fell this week for a fourth straight week amid persisting turmoil in stock markets and global economic worries.

Here's a look at rates for fixed- and adjustable-rate mortgages this week and over the past year:

Current avg.Last week52-week high52-week low30-year fixed3.79 percent3.81 percent4.09 percent3.59 percent15-year fixed3.07 percent3.10 percent3.26 percent2.92 percent5-year adjustable2.90 percent2.91 percent3.09 percent2.82 percent