What the weekly survey covers
The Mortgage Bankers Association's Weekly Applications Survey has run since 1990 and covers over 75 percent of all US retail residential mortgage applications, collected from mortgage bankers, commercial banks and thrifts. It publishes a composite index alongside separate purchase and refinance indices, each based to March 16, 1990 = 100.
Applications are not originations. A single borrower shopping three lenders generates three applications, and a meaningful share of applications never close. The index is best used as a directional, high-frequency demand signal rather than as a volume estimate.
Refinance is the volatile half
Through the spring of 2026 the refinance index swung far more sharply week to week than the purchase index. That asymmetry is structural: a refinance decision can be made and reversed within days in response to a rate move, whereas a purchase application sits at the end of a months-long search and is far less rate-elastic in the short run.
With Freddie Mac's survey rate near its 2026 low of 5.98 percent in late February, a population of borrowers who had taken loans at higher rates came briefly into the money. As the survey rate worked back up through the summer to 6.95 percent by mid-September, that population shrank again.
Purchase demand as the underlying floor
The purchase index is the more useful series for housing-market readers precisely because it is duller. It reflects households that have decided to buy and are seeking financing, and it tracks the eventual closing series with a lag of roughly one to two months.
Analysis: the divergence between the two components through 2026 describes a market where rate-sensitive financial activity switched on and off while the underlying flow of home purchases stayed within a narrow band. That is a different condition from a broad demand collapse, and it is also different from a recovery.
Reading weekly data responsibly
MBA adjusts the weekly indices for holidays, but single-week moves of ten percent or more are routine and rarely meaningful in isolation. Four-week averages are the standard way practitioners smooth the series.
MBA is a trade association and the survey is proprietary; the weekly releases are summarised publicly with limited detail. Figures cited here are drawn from the association's published research pages.
What the June weeks actually showed
Three consecutive June surveys illustrate the pattern. In the week ending June 5, the composite index rose 10.8 percent seasonally adjusted, the refinance index rose 15 percent week over week and 20 percent year over year, and the refinance share climbed to 40.2 percent from 38.0 percent, with the 30-year contract rate at 6.60 percent.
A week later the composite fell 3.8 percent and the refinance index 5 percent, though refinancing remained 17 percent above the prior year and the refinance share edged up to 40.3 percent. In the week ending June 19 the composite rose 1.0 percent, the refinance index 3 percent, and the refinance share reached 41.5 percent with the 30-year rate at 6.59 percent.
Government program shares in that week were 17.9 percent FHA and 12.3 percent VA. Analysis: a refinance share above 40 percent with rates near 6.6 percent is not the classic refinance wave of a falling-rate cycle. It reflects a pool of borrowers who took loans at higher rates than the prevailing average and for whom even a small decline is worth acting on, which is why the index swings so sharply on ten-basis-point moves.