In today’s mortgage market, pricing strategy has become as much an exercise in risk management as it is in competitiveness, with capital markets teams navigating the complexities of geopolitical tensions, shifting Federal Reserve expectations, and evolving Agency execution frameworks. Lenders are under increasing pressure to deliver pricing that meaningfully benefits borrowers while preserving margin and protecting against volatility. Unfortunately, many of the components that make up a loan’s price are adjustments that make prices and rates worse.
There are positive pricing adjustments that non-capital markets personnel should be aware of, along with the reasoning behind those adjustments. The most popular option for secondary marketing staff to use is specified pool execution when selling loans. It is important to step back and consider the role of specified pools, or “spec pools,” within the broader Agency mortgage-backed security (MBS) ecosystem.
At their core, spec pools are curated groups of mortgage loans that share certain attributes associated with more stable and predictable prepayment behavior. They are similar to loan level price adjustments that are known to every MLO (a hit for condo, LTV, etc.). Unlike generic, “to-be-announced” securities, which represent a broad and relatively undifferentiated pool of mortgages, spec pools are constructed with intentionality, often focusing on characteristics such as lower loan balances, higher borrower credit quality, occupancy type, or loan-to-value ratios. These attributes matter because they influence the likelihood that a borrower will refinance or otherwise prepay their mortgage, which in turn affects the timing and magnitude of cash flows to investors.
Prepayment risk sits at the heart of investors valuing mortgage-backed securities (MBS). To be blunt, no investor wants to pay 105 for a loan that pays off at 100 four months later. When borrowers prepay faster than expected, investors are forced to reinvest returned principal at prevailing market rates, which may be lower than the yield on the original security. As a result, securities that exhibit slower and more predictable prepayment speeds are inherently more valuable, particularly in environments where rate volatility is elevated or where the direction of rates is uncertain.
Spec pools address this concern by offering a degree of prepayment protection, and investors are typically willing to pay a premium, known as a “pay-up,” to access that protection. This pay-up represents the incremental price above standard TBA execution and can translate directly into improved economics for lenders who are able to identify and deliver eligible collateral.
However, the relationship between spec pool characteristics and pricing is neither static nor simple. In recent months, the level and consistency of pay-ups have become more variable, reflecting the broader uncertainty in rates and volatility. Where pay-ups were once modest and relatively stable, they have now reached levels that can materially influence loan-level economics.
Current price pickups for low loan balance spec pools remain compelling, though they vary by coupon and market conditions. In higher coupon stacks, particularly in the 5.5% and 6.0% range where many loans are currently in the money, pay-ups for low balance pools such as those under $250,000 or $300,000 have generally remained resilient, often ranging from several ticks to over a point depending on the exact composition and execution channel.
One notable development is the introduction of new Freddie Mac Cash-Specified Payup Types (CSPTs) for 30-year fixed-rate mortgages, now available for both mandatory and best-efforts executions. Effective for production as of April 6, 2026, these CSPTs apply to loans within two low-loan-balance thresholds, $425,000 and $450,000, and provide lenders with an additional mechanism to capture execution value tied to loan characteristics that are increasingly prized in the secondary market.
Pools in the $425,000 and $450,000 buckets introduced under the new CSPTs may not command the same level of premium as smaller balance cohorts, but they still offer meaningful incremental value relative to TBAs, especially when combined with other favorable attributes such as high loan-to-value ratios or certain occupancy profiles. For lenders, the ability to systematically identify and capture these pay-ups can represent a significant competitive advantage, particularly in a margin-compressed environment.
The increasing importance of spec pools also reflects a shift in how mortgage assets are evaluated and traded. Advances in data availability and analytics have enabled investors to move beyond aggregate assumptions and toward more granular, loan-level analysis. Through mechanisms such as bid tapes, which provide detailed datasets on individual loans, investors can assess prepayment risk with greater precision and assign value accordingly. This has led to a more differentiated market in which strong collateral is explicitly rewarded, while less attractive loans may be discounted. While this creates opportunities for enhanced execution, it also introduces greater variability and complexity, requiring more sophisticated infrastructure and expertise on the part of lenders.
Recent prepayment data underscores the importance of this granularity. Analysis of Fannie Mae 30-year 5.5% and 6.0% coupon securities shows that not all spec pool stories perform equally. In the 5.5% cohort, for example, overall speeds increased by approximately 28%, but certain segments, including low balance pools in the $250,000 to $300,000 range and high loan-to-value loans, experienced even faster increases, highlighting the sensitivity of different borrower segments to refinancing incentives. Similarly, in the 6.0% cohort, which saw a more moderate 19% increase in speeds, higher loan balance segments prepaying faster than the broader cohort suggests that traditional assumptions about prepayment behavior must be continually reassessed in light of evolving market conditions.
Looking ahead, expectations are for a modest deceleration in prepayment speeds, with forecasts suggesting a roughly 5% decline in aggregate Fannie Mae speeds in the next reporting period. For spec pools, this environment reinforces their value proposition, as slower speeds enhance the relative benefit of prepayment protection and can help sustain pay-ups even as broader market conditions stabilize.
Ultimately, the growing prominence of spec pools and tools like CSPTs reflects a market that is becoming more complex, more data-driven, and more sensitive to borrower-level dynamics. For mortgage lenders, the challenge is to actively manage it, balancing the opportunity to deliver better pricing to borrowers against the need to maintain disciplined risk management. Integrating these elements into a capital markets strategy will allow for better positioning to navigate volatility, optimize execution, and compete in an increasingly differentiated marketplace. Capital markets teams must decide how much of that premium to pass through to borrowers in the form of better rates and how much to retain as a buffer against potential market swings. Rob Chrisman
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