Why Cherry Hill Mortgage’s MSR strategy leans on interest-only agency RMBS

Reviewed: ad hoc news Software & Services desk. Edited and checked on 2026-06-18, 22:13. Details in the imprint.

When you look at Cherry Hill Mortgage’s interest-only agency RMBS for the first time, it feels like peeking into the engine room of the REIT’s strategy rather than at a classic retail product. No glossy app, no slick card - just basis points, cash flows, and prepayment assumptions.

How interest-only RMBS work

Interest-only agency RMBS, often shortened to IOs, are mortgage-backed securities where investors receive only the interest portion of cash flows, not the principal repayments. They are typically carved out of pools of agency mortgage-backed securities guaranteed by Fannie Mae, Freddie Mac, or Ginnie Mae.

Because payments depend heavily on how quickly underlying mortgages are prepaid, IO prices are extremely sensitive to changes in prepayment speeds and interest rates. Rising rates usually slow prepayments, which tends to help IO cash flows, while falling rates can erode them quickly.

Why they sit next to MSRs

Cherry Hill Mortgage is known for its focus on mortgage servicing rights, assets that benefit when homeowners do not refinance too quickly because the servicer keeps collecting monthly fees. That profile gives MSRs a strong, often positive, sensitivity to interest rate rises over time.

Interest-only agency RMBS can be used to fine-tune that exposure, because they are also tied to prepayment behavior but with different cash flow dynamics. In its quarterly materials, Cherry Hill explicitly groups IOs with other agency RMBS positions that complement the MSR book.

What Cherry Hill discloses

In recent investor presentations, Cherry Hill lists “interest-only agency RMBS” as a dedicated sleeve within its investment portfolio, alongside MSRs, non-agency RMBS, and other agency securities. The company highlights that these IO positions are relatively small compared with its core MSR holdings, but still meaningful for risk management.

Management describes the overall strategy as seeking to generate attractive risk-adjusted returns through a portfolio of MSRs and other residential mortgage assets, using hedges and selected securities to manage interest rate and prepayment risk. Interest-only agency RMBS fit into that toolkit as one of several levers.

Risk profile and what can hurt

For professional investors, the appeal of IOs lies in their high sensitivity to prepayments and the embedded leverage in the structure. Small shifts in prepayment assumptions can cause outsized moves in valuation, which can be useful if you have a strong, differentiated macro view.

The flip side is brutal: if mortgage rates fall quickly and refinancing picks up, the expected stream of interest payments can shorten dramatically, leading to write-downs. That asymmetry is one reason Cherry Hill keeps IO exposure measured compared with its MSR stake, which forms the economic core.

Daily reality behind the acronyms

From the outside, interest-only agency RMBS sound abstract, but on the trading desk level they translate into close monitoring of yield curves, mortgage rate sheets, and prepayment models. Portfolio managers watch how new loan production, seasoning, and housing turnover feed into their assumptions.

In practice, that means stress-testing the IO book against different paths for the Federal Reserve’s policy rate and for long-term yields, as well as against shocks such as sudden credit loosening or government refinancing programs. The securities sit at the intersection of macroeconomics, micro-level borrower behavior, and technical market flows.

Who this “product” is really for

Unlike MSRs sold by banks to servicers or vanilla agency MBS held by mutual funds, interest-only agency RMBS mainly live in the portfolios of specialized mortgage REITs, hedge funds, and sophisticated institutional investors. Minimum lot sizes and complexity keep retail investors at a distance.

For Cherry Hill, the IO book is less about marketing any specific security and more about constructing a balanced profile when seen together with its MSRs, term financing, and derivatives hedges. The product is technical, but the aim is simple: stabilizing earnings in a volatile rate environment.

Where the stock fits in

Cherry Hill Mortgage Investment Corporation (ISIN US1635821018) is listed on the New York Stock Exchange under the ticker CHMI and presents itself as a specialty mortgage REIT focused on MSRs and related assets.

This article was AI-assisted and editorially reviewed. Product information without guarantee; prices and availability may change at short notice. No investment advice, no buy or sell recommendation. Stock-market transactions involve risks up to total loss.