Just when it seemed like rates could not fall any further, Freddie Mac reported fixed mortgage rates sunk even further for the week ending May 10.

The 30-year fixed-rate mortgage averaged 3.83 percent (0.7 point), down slightly from last week’s average of 3.84 percent. A year ago at this time, the 30-year was 4.63 percent.

The 15-year fixed also moved downward, ending at 3.05 percent (0.7 point) this week. Last week it averaged 3.07 percent, and last year at this time it was 3.82 percent.

The 5-year ARM dropped to 2.81 percent (0.5 point) compared to 2.85 percent last week and 3.41 percent a year ago at this time.