It looks like it finally happened. Mortgage interest rates actually stopped declining. There is no new record low this week. It appears as if last week was the time to buy or refinance for anyone wanting the best interest rate ever. Now, interest rates aren’t bad, they are still just about record lows, and are only up slightly from a week ago. According to the Primary Mortgage Market Survey the average 30 year fixed rate mortgage was 4.35%, and the average 15 year fixed mortgage rate was 3.83%.