The average rate on a 30-year fixed mortgage slipped this week and stayed near its record low, a trend that has helped boost home sales and refinancing. Mortgage buyer Freddie Mac said Thursday that the rate declined to 3.39 percent, from 3.41 percent last week. Four weeks ago, it touched 3.36 percent, the lowest on records dating to 1971. The average on the 15-year fixed mortgage, often used for refinancing, fell to 2.70 percent. That’s down from 2.72 percent last week and close to the record low of 2.66 percent, reached two weeks ago.
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