The MBA Weekly Applications Survey tracks U.S. mortgage application activity through purchase, refinance, market, loan-type, product, rate, and composition measures.
The Weekly Mortgage Applications Survey (WAS) is a Mortgage Bankers Association (MBA) survey that tracks week-to-week changes in U.S. closed-end residential mortgage application activity through a family of indexes. Its best-known measures are the Market Composite Index, Purchase Index, and Refinance Index.
The survey measures applications submitted through participating lenders’ retail and consumer-direct channels. It does not report the number of unique borrowers, approved loans, funded originations, home-sale contracts, or completed property transactions. An application can be denied, withdrawn, duplicated at another lender, or abandoned before closing.
MBA describes the survey as covering U.S. closed-end residential mortgage applications originated through retail and consumer-direct channels. Respondents include:
The survey does not cover every lender or origination channel. MBA continues to recruit participants to maintain or improve representation of the covered market. Because participation and market structure can change, use current methodology materials rather than treating an old sample statistic as permanent.
A closed-end mortgage generally advances a defined principal amount under stated repayment terms. The survey scope should not be read as automatically including open-end products such as every home equity line of credit.
The covered application is still an early-stage record. Survey inclusion does not establish that:
MBA publishes multiple indexes that divide applications by purpose, loan type, and product. The survey product describes 15 application indexes.
| Index family | Included activity | Main analytical question |
|---|---|---|
| Market Composite Index | All covered applications | Is overall application activity rising or falling? |
| Purchase Index | Applications to finance single-family home purchases | Is covered purchase-financing interest changing? |
| Refinance Index | Applications to refinance existing mortgages | Is covered refinance interest changing? |
| Conventional indexes | Conventional purchase or refinance applications | How is non-government application activity changing? |
| Government indexes | Applications associated with FHA, VA, RHS, and related government programs | How is covered government-program activity changing? |
| Fixed-rate indexes | Covered fixed-rate products | How is fixed-rate application activity changing? |
| ARM Index | Covered adjustable-rate products | How is adjustable-rate application activity changing? |
The same application can contribute to more than one classification. A conventional fixed-rate purchase application, for example, belongs in the Market Composite, Purchase, Conventional, and fixed-rate categories. The indexes are overlapping views of the same covered market, not counts that should be added together.
The Market Composite Index measures the overall level of covered mortgage application activity. It combines purchase and refinance applications, so its movement can conceal sharply different components.
Suppose the Market Composite rises 6% while:
The correct interpretation is not that home-buying applications rose 6%. Overall activity increased because refinance growth more than offset weaker purchase activity. The component indexes identify the driver.
The Purchase Index includes covered mortgage applications for purchases of single-family homes across conventional and government loan types and major products.
It is often used as timely evidence about financed home-purchase demand, but it is not a home-sales count because:
The Purchase Index can move before Existing Home Sales, but the timing relationship is not fixed. Application-to-closing delays and fallout vary.
The Refinance Index includes covered applications to refinance an existing mortgage. Refinance activity often responds to changes in mortgage rates, but the relationship is conditional.
A lower market rate creates an incentive only when the expected benefit exceeds costs and the borrower can qualify. Relevant factors include:
A rate decline can therefore produce a small response when few borrowers have higher-rate loans or when underwriting and costs limit eligibility. Conversely, refinance applications can rise for cash-out or term changes even when the rate incentive is modest.
The index measures applications, not funded refinances. It should not be used as a direct count of mortgage prepayments.
All WAS indexes are benchmarked to 100 for the week ending March 16, 1990. An index level of 250 indicates activity at 2.5 times the base-period index level within the same series and methodology; it does not mean 250 applications or $250 million of applications.
The week-to-week percentage change is:
1Index change = (Current index / Prior index - 1) x 100
If an index rises from 215 to 225:
1Index change = (225 / 215 - 1) x 100 = 4.65%
Index levels are meaningful only when the same series and adjustment basis are compared. Do not compare a seasonally adjusted Purchase Index directly with an unadjusted Refinance Index level and call the difference market share.
An index supports consistent changes through time without publishing a complete raw market count. It also allows MBA to preserve continuity when the participant sample changes by linking the new sample’s level to the existing index at a transition date.
That continuity does not make the survey a census. Changes in participants, channels, product mix, and methodology remain relevant to long-run interpretation.
Mortgage applications have recurring seasonal and calendar patterns. Home-purchase activity often varies through the year, while holidays reduce the number of business days and borrower interactions in a survey week.
MBA’s methodology distinguishes:
Public releases identify when results include a holiday adjustment. This note is essential. A raw week-over-week decline around Thanksgiving, Christmas, Independence Day, or another holiday can mainly reflect fewer working days.
It is possible for the adjusted index to rise while the unadjusted index falls. That is not a contradiction. The adjusted comparison estimates activity after accounting for an expected calendar effect, while the raw comparison reports the observed index movement.
Use:
Adjustment reduces predictable timing effects; it does not remove all volatility or measurement error.
MBA releases often report the shares of applications represented by refinancing, adjustable-rate mortgages, and government programs such as FHA, VA, and USDA.
A share is a ratio:
1Category share = Category applications / Total covered applications x 100
The interpretation must consider both numerator and denominator.
Suppose refinance applications fall from 60 to 54 index-consistent units while purchase applications fall from 40 to 26:
1Earlier refinance share = 60 / (60 + 40) = 60.0%
2Later refinance share = 54 / (54 + 26) = 67.5%
The refinance share rises even though refinance activity falls, because purchase activity falls more. A higher share does not prove higher category volume.
The same rule applies to ARM, FHA, VA, USDA, and conventional shares. Review the corresponding index or volume change before explaining a composition shift.
Weekly releases commonly report average contract interest rates and points for specified products, such as:
The published observations use stated survey assumptions. Recent releases, for example, present points including the origination fee for loans at an 80% Loan-to-Value Ratio. Product balance limits and definitions can change, so the current release footnotes control.
The contract interest rate is only one part of borrowing cost. Points are upfront charges expressed relative to the loan amount. A lower rate accompanied by higher points may not reduce total cost for a borrower with a short expected holding period.
MBA also states whether its calculated effective rate rose or fell. That measure incorporates rate-and-point movement under the survey methodology, but it is not a personalized annual percentage rate or a quote available to every applicant.
Borrower credit, occupancy, property, loan size, lock period, lender pricing, and market timing can produce a different offered rate.
Assume a weekly release shows these illustrative changes:
| Measure | Weekly change | Initial reading |
|---|---|---|
| Market Composite Index, adjusted | +5% | Overall covered applications increased |
| Purchase Index, adjusted | -1% | Purchase applications softened slightly |
| Refinance Index, adjusted for holiday | +14% | Refinance applications increased sharply |
| Refinance share | 42% to 46% | Refinancing became a larger part of activity |
| 30-year contract rate | -12 basis points | Survey rate declined |
| Points | +0.10 point | Upfront pricing increased |
The appropriate initial conclusion is that the headline increase was refinance-led. It does not show that purchase demand, home sales, or mortgage originations rose.
Before drawing a stronger conclusion, check:
The result can support a statement about surveyed application activity. It cannot prove that lenders will fund more loans or that housing prices will change.
The WAS sits near the beginning of a longer process.
| Stage | Representative measure | What can prevent progression? |
|---|---|---|
| Borrower interest | Rate inquiries or prequalification | Payment, credit, property, or timing concerns |
| Formal application | MBA application indexes | Withdrawal, denial, duplicate shopping, incomplete file |
| Underwriting and approval | Lender pipeline data | Income, assets, credit, appraisal, title, insurance |
| Rate lock | Lender lock data | Price changes, expiration, borrower fallout |
| Closing and funding | Origination records | Unmet conditions, failed transaction, documentation |
| Home-sale completion | Existing Home Sales or transaction records | Contract cancellation or delayed settlement |
| Loan performance | Servicing and delinquency data | Borrower or collateral stress after origination |
Applications lead later stages but do not map one-for-one into them. Conversion rates can change with credit standards, capacity, rates, property conditions, and borrower behavior.
| Indicator | Event measured | Key distinction |
|---|---|---|
| Weekly Applications Survey | Covered mortgage application activity | Index-based, early in financing process |
| Existing Home Sales | Completed resale transactions | Includes cash and financed closings |
| New Home Sales | Contract signed or deposit accepted for qualifying new house | Can occur before construction or mortgage funding |
| Housing Starts | Excavation begins for a new residential foundation | Physical construction, not financing application |
| Homeownership Rate | Share of occupied units that are owner-occupied | Slow-moving tenure stock, not weekly activity |
| House Price Index | Price change under a stated methodology | Value movement, not application volume |
The series can diverge. Purchase applications can fall while closings rise because current closings reflect earlier applications. Applications can rise while home sales remain flat if approval or closing conversion weakens. Refinance applications can surge without any property sale.
Lenders use timely application direction to assess potential staffing, underwriting, processing, closing, and funding demand. The public index is market context; each lender still needs its own application count, pull-through rate, cycle time, and market share.
Applications can precede rate locks and funded loans. A sudden application shift can change expected pipeline composition, but not every application becomes a locked commitment. Hedging decisions require lender-specific lock status, fallout assumptions, product, duration, and delivery data.
Refinance applications can provide early context for refinance-related prepayment risk in mortgage servicing rights and Mortgage-Backed Securities. They are not actual prepayments. Borrowers may abandon applications, fail underwriting, or choose a lender outside the surveyed channel.
The Purchase Index can add timely evidence about financed buyer activity. It omits cash buyers and precedes closing, so it should be paired with pending sales, existing and new home sales, inventory, affordability, and local market data.
Government, conventional, ARM, fixed-rate, purchase, and refinance measures help analysts monitor composition. A shift in share can arise from relative changes between categories and does not by itself show looser credit or higher risk.
Potential influences include:
The survey does not isolate the causal effect of each factor. A rate decline and an application increase in the same week do not prove that rates alone caused the movement.
Before using a WAS release, verify:
Weekly mortgage application data are educational market evidence, not personalized mortgage, refinance, investment, or hedging advice. Verify the latest MBA release, methodology, product assumptions, and lender-specific data before making a financial decision.