Mortgage interest rates continued to hover at 50-year lows this week as Freddie Mac announced Thursday that the average rate on a 30-year fixed-rate mortgage tied the all-time low for the 39-year-old survey. For the week ended Thursday, the 30-year fixed-rate mortgage averaged 4.57 percent, unchanged from last week.

“Compared to the recent peak in 30-year fixed interest rates 13 months ago, current rates are a full percentage point lower,” said Frank Nothaft, Freddie Mac vice president and chief economist. “With today’s rates, home buyers would save about $1,500 in payments each year on a $200,000 loan compared to rates last June.”

The 15-year fixed-rate mortgage averaged 4.06 percent, down from last week when it averaged 4.07 percent. The five-year Treasury-indexed hybrid adjustable-rate mortgage averaged 3.85 percent this week, up from 3.75 percent last week. The one-year ARM averaged 3.74 percent, down from last week’s average of 3.75 percent. The one-year ARM was the lowest it has been since Freddie Mac began tracking it in 1984.