The S-Curve

Welcome to The S-Curve

Now you will be able to receive the latest announcements, product updates, and our insights on the mortgage market in real time.

The name of the blog, the S-Curve, is a reflection of our logo and the central feature of our prepayment model. S-curves are seen in nature in many phenomenon, from population growth to prepayment and default models. Our first S-curve, in the early 1990s, used the arctangent function, then piece-wise linear functions, and evolved over time to be more complex and vary by FICO, loan size and LTV. This evolution encapsulates both the timeless nature of fundamental relationships and constant innovation to describe them better over time.

We hope you find the information useful and we look forward to your feedback.

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Blog - Latest
  • Leveraging Data and Analytics: Highlights from the IMN MSR Forum 2024

    Joni Baker

    Events

    Andrew Davidson & Co. Inc. (AD&Co) proudly sponsored the Information Management Network (IMN)’s 10th Annual Mortgage Servicing Rights (MSR) Forum, held November 21 - 22, 2024 at the New York Marriott at Brooklyn Bridge. Our servicing expert Richard Cooperstein moderated and I spoke on the panel “Leveraging Trended Data to Enhance Your MSR Portfolio’s Mortgage Prepayment and Credit Modeling.” This panel focused on enhanced consumer data, its impact on delinquencies and prepayments (as shown in our white paper), and the process to bring the data and analytics into decision-making.

    Other panels at the event discussed a variety of topics, including the interest rate outlook, macroeconomic factors, climate factors, and their effects on prepayments, escrow, originations, delinquencies, new versus seasoned MSRs, MSR supply and demand, and rate hedging strategies and functionality. The panel discussions underscored the need for a deeper understanding and management of the interest rate and credit risks embedded in the federal mortgage servicing asset. Recapture and the importance of good customer service were recurring themes throughout the conference.

    Cautious Optimism for the MSR Market

    The overall sentiment regarding MSR assets was a cautious optimism: Despite being a complex asset class, the MSR market remains strong, and people want to buy. Many panelists took the view that due to full employment, a strong GDP, and expectations about the economy and a large and increasing deficit, interest rates in 2025 would see at most a modest decrease before rising again. However, this view was not universally shared, with some pointing to a potential economic downturn and increased defaults being hinted at by delinquency trends in auto credit being close to pre-Covid levels, and the subset of Covid forbearance mortgages that will ultimately default.

    For borrowers who already have low mortgage rates, there is limited room for modification; it is interesting to note that one servicer mentioned having some mortgages in foreclosure even with low LTV. Meanwhile, some borrowers bought homes in 2023 hoping to ultimately refinance into lower rates, but the opportunity has not arisen (and might not anytime soon). Finally, due to climate factors and inflation, insurance in some areas is becoming increasingly unaffordable or unavailable. In some regions, such as Florida, some condominium owners are facing massive assessments. One servicer noted that with the current high home prices, most consumers facing high insurance increases can sell their homes. However, there is evidence that when insurance premiums rise to the level of 30-40% of principal and interest, delinquencies also begin to rise. AD&Co’s Climate Impact Suite (currently in beta testing) distinguishes between the effect of climate change on home prices (through Climate Conditioned HPA) and the effect of high premiums on borrower behavior (through Climate Conditioned LDM), with the first effect feeding into the second; if the CLTV remains low, high premiums lead to increased turnover, but if the CLTV becomes high, delinquencies increase.

    Uncertainty and the Importance of Prepayment Forecasting

    In general, and especially with the new administration coming in, uncertainty was a key theme throughout the forum. It was suggested more than once that the economy may have some curve balls. Regardless – and as always – the ability to forecast prepayment speeds is key for valuing MSR’s. Prepayments determine the total base fee collected on a mortgage, as well as the earnings on escrow and payment float, which have become larger and increasingly important components of MSR valuation due to higher interest rates.

    For current coupon mortgages, much depends on the interest rate forecast. For low-rate mortgages, however, it's important to understand the economics of turnover (especially when no rate incentive exists) and predict which borrowers are more likely to prepay at a low rate, such as 3%. The overall low prepayment rate among this set could potentially rise due to a pent-up demand to move, especially with more firms pushing for employees to return to the office.

    Many panelists spoke about recapture, which was a prominent theme of the conference: recapture refers to the situation in which the servicer retains the borrower by servicing the new loan as well. Some servicers account for recapture in their valuation, and some use models for predicting recapture rates. The necessity of providing excellent customer service arose in multiple panels as essential for increasing recapture and selling ancillary products while also reducing delinquencies and defaults.

    "Know Your Data and Your Portfolio"

    One panelist observed that, in the current environment, it is now more important than ever for servicers to “know your data and your portfolio”. The topic was addressed during the AD&Co-moderated panel “Leveraging Trended Data to Enhance Your MSR Portfolio’s Mortgage Prepayment and Credit Modeling”. David Doyle of Sagent first discussed some of the challenges in understanding the strengths and risks of potential MSR acquisitions, while Gauhar Turmuhambetova of BlackRock outlined the challenges of using dynamic credit bureau data in the valuation of securitized products. Bindiya Jain of Experian described the granular loan-level insights available on their platform and specifically within their mortgage performance dataset. Then I shared research that illustrates how Experian’s trended data attributes may be used to improve mortgage prepayment and delinquency forecasts beyond what may be inferred from a traditional credit score. I also demonstrated through AD&Co’s MSRKinetics application how these improved forecasts would affect the base fee and cost components of MSR valuation for sample GSE and FHA loans, as well as their weighted average lifetimes and duration profiles.

    Overall, IMN’s MSR forum provided a rich opportunity to engage with participants in the MSR industry, learn about their views and needs, and explore potential synergies.

Blog - Archives

The S-Curve Archives

  • Vivian Li, Rob Landauer

    Events

    Andrew Davidson & Co., Inc (AD&Co) proudly sponsored IMN’s 11th Annual Mortgage Servicing Rights (MSR) Forum by Informa at the New York Hilton Midtown. Senior modeler Daniel Swanson joined the “Managing Delinquencies & Forbearance Value” panel in discussing how servicers are adapting to today’s market and the evolving delinquency trends.

  • Kevin Lin, Eknath Belbase

    Podcast

    Tune in to our fourth episode of AD&Conversations with Kevin Lin and Eknath Belbase, our product lead for our Climate model. In this episode, they discuss the new Climate Impact Suite (CIS) pilot project, and Belbase outlines several challenges the team is navigating, including:

  • Kevin Lin, Eknath Belbase

    Podcast

    Tune in to our fourth episode of AD&Conversations with Kevin Lin and Eknath Belbase, our product lead for our Climate model. In this episode, they discuss the new Climate Impact Suite (CIS) pilot project, and Belbase outlines several challenges the team is navigating, including:

  • Andrew Davidson

    Podcast

    Andrew Davidson was invited to speak on Equifax's Market Pulse Podcast titled, "Driving Efficiency and Resilience in the Mortgage Industry" live at the 2025 MBA Annual Convention in Las Vegas. 

    Andy explains how variations in data files can distort risk assessment, creating a dual risk for lenders: extending credit to borrowers more likely to default while overcharging customers whose risk is overstated. 

  • Richard Cooperstein

    Thoughts

    Our latest Policy Perspective written by Richard Cooperstein offers an analysis of the U.S. housing and mortgage finance markets, focusing on key trends and forward-looking risks. While housing markets are not fully efficient, they do respond to economic imbalances which create opportunities and vulnerabilities. This article explores how demographic shifts, credit access, interest rates, and climate risks shape both housing demand and supply.

    Key findings include:

  • Kevin Lin, Richard Cooperstein

    Podcast

    Join Kevin Lin in a conversation with Richard Cooperstein as they dive into Kinetics, AD&Co's modular platform designed to deliver the full power of our models and analytics; with the flexibility to license only the tools you need.

  • Andrew Davidson

    Thoughts

    The latest Policy Perspectives paper “Competing Claims in Privatization of Fannie Mae and Freddie Mac” is now available!

    Nearly 20 years ago, on September 6, 2008, the GSEs, Fannie Mae and Freddie Mac entered conservatorship. Since that time there have been many proposals to restructure, eliminate or release the GSEs. Once again there is talk about the privatization of Fannie Mae and Freddie Mac.

  • Tom Parrent

    Thoughts

    AD&Co held our annual employee meeting in Detroit, Michigan. In addition to gathering everyone in person to socialize and strategize, we use these annual meetings to learn about different cities, especially with regard to housing market dynamics.

    We chose Detroit because the oft-maligned city is undergoing a significant renaissance, and we wanted to explore the area and learn how housing may have played a role in both Detroit’s decline and rebirth.

  • Niraj Tailor, Hikmet Senay

    Products

    Andrew Davidson & Co., Inc (AD&Co) is pleased to announce the beta release of MARS+, the next generation of Mortgage Analysis & Reporting System (MARS), which has been in use since 2008 for performance reporting of AD&Co models. MARS+ aims to provide enhanced and advanced capabilities and features for mortgage analysis and reporting.

    The new enhancements of MARS+ include:

  • Eknath Belbase, Laura Silberg, Aidan Loftus, Joni Baker, Sam Sutton, Richard Cooperstein

    Events

    Several AD&Co employees attended SFVegas 2025. This post shares their unique perspectives from attending the conference and key takeaways from the sessions.