Conventional mortgage lenders tightened credit standards in September, pulling back on certain cash-out refinance and investor loan programs even as non-agency lending continued to expand.
The divergence highlights a changing lending market in which some traditional financing options are becoming harder to obtain while alternative products are capturing a growing share of production.
The Mortgage Bankers Association's Mortgage Credit Availability Index (MCAI) declined 0.2% to 107.1 in September, according to data released Thursday. The Conventional MCAI fell 0.4%, while the Government MCAI remained unchanged.
The overall decline was modest, but the changes in available loan programs were more revealing.
"Mortgage credit availability decreased slightly in September, as lenders tightened documentation requirements on conventional loans and reduced offerings of loans that allow for cash-out refinances and investor home purchases," said Joel Kan, MBA's vice president and deputy chief economist.
The tightening also extended to jumbo lending, where credit availability declined for a second consecutive month.
"However, recent growth in non-agency loan programs continues to support this segment of the market," Kan said.
Non-QM Continues To Gain Market Share
The conventional pullback comes amid growing demand for financing outside traditional agency guidelines.
Non-QM and expanded-guidelines loans accounted for 11.3% of mortgage rate-lock volume in August, the highest share recorded in Optimal Blue's three-year data.
That was up approximately 1 percentage point from July and 2.9 percentage points from a year earlier.
Investor and debt-service coverage ratio (DSCR) loans accounted for 35.1% of Non-QM production, an increase of 6.66 percentage points from August 2025. Bank-statement loans represented another 29.8%.
The figures suggest that investor financing is becoming an increasingly important source of Non-QM business at a time when conventional lenders are reducing certain investment-property offerings.
The two reports measure different aspects of the market. MBA tracks the availability of mortgage credit, while Optimal Blue measures rate-lock activity.
Still, the contrast is notable: Conventional lenders are becoming more selective about certain loans while alternative financing continues to attract borrowers and capital.
Investor Lending Moves Beyond Conventional Guidelines
Conventional investment-property loans generally rely on the borrower's personal income, debt obligations, and other underwriting requirements. DSCR programs, by comparison, typically qualify investment properties primarily on their rental income relative to debt payments.
That difference can offer another financing option for investors who don't fit conventional guidelines or prefer a loan structured around a property's cash flow.
It also helps explain why lenders have been expanding their presence in the segment.
Industry forecasts projected Non-QM originations could reach approximately $175 billion in 2026, up from about $108 billion last year. DSCR and other investor products were expected to account for roughly half of Non-QM collateral.
Institutional investor demand has helped support that expansion, giving lenders additional outlets for loans that fall outside agency guidelines.
The growing competition has also narrowed pricing differences between some DSCR and conventional products, although qualifying requirements, reserve standards, and loan terms can vary considerably among lenders.
A More Selective Lending Market
MBA's September report does not suggest lenders are tightening across every product category.
The Conforming MCAI declined 0.2%, while the Jumbo MCAI fell 0.3%. Government credit availability was unchanged for the third consecutive month.
The decline in jumbo availability is particularly notable because non-agency programs are helping support that segment even as overall product availability contracts.
That suggests lenders are adjusting their credit offerings rather than making a uniform retreat from higher-balance or nontraditional lending.
The trend also aligns with lenders' expectations for the remainder of 2026.
A Mortgage Collaborative survey found that 72% of respondents were working to expand investor and agency relationships. Conventional purchase loans and Non-QM lending ranked among their largest anticipated opportunities for volume growth.
For originators, September's credit tightening adds another reason to examine financing options beyond conventional programs, particularly for investors, self-employed borrowers, and homeowners seeking access to equity.
That doesn't mean a Non-QM loan will necessarily be easier to qualify for or offer better terms. Underwriting standards, pricing, and eligibility can differ substantially among lenders.
But with conventional lenders reducing certain offerings and non-agency programs continuing to grow, knowing which lenders will finance a particular borrower or property could become increasingly important.
The broader credit market may be tightening slightly, but the opportunities are not disappearing evenly.
