Rates on 30-year fixed-rate mortgages dropped for a third day Tuesday, subtracting another 15 basis points to accumulate a 26-basis-point drop across the three days. Now averaging 7.44%, the decline has reversed most of the 32-basis-point spike the flagship average saw last Thursday, when the average leaped to 7.70% and set what was estimated to be a new 20-year high.
The…