Does the discount-to-NAV thesis cover mortgage REITs or only the ones that own buildings?

Question

I look at debt more than equity, so when I see the valuation gap argument I want to know whether it reaches the paper side.

The names I follow hold agency MBS and some whole loans, quote a book value per share every quarter, and trade at 0.8 to 0.95 of that book. Yields in the low teens. If somebody tells me listed real estate trades at a historic discount, I tend to assume this is a different discount with a different cause. Book value on an MBS portfolio is a mark on securities, and the discount to it reflects what the market thinks of hedging and funding, not what it thinks of building values.

Two specific things I want to get straight. First, when a broad REIT index fund reports its holdings, how much of it is mortgage REITs? If it is a couple percent I can ignore it, if it is more I need to know I am holding a repo-funded spread book inside what I thought was a property allocation. Second, is there any version of the convergence argument that applies to the paper side, or does that story rely entirely on tightening supply and rents?

Rena Expert · Accepted Answer

The strict distinction is worth holding onto because the market talks loosely. An equity REIT owns and operates real property and earns rent. A mortgage REIT holds mortgage loans or mortgage-backed securities and earns net interest spread. Both elect REIT status and both distribute most of their taxable income, which is why people lump them together under one word. The valuation-convergence argument, gaps against equities and against private real estate marks, is about equity REITs. It is built on rents, supply and cap rates.

On index composition: the major broad listed-real-estate indexes are constructed as equity REIT indexes and either exclude mortgage REITs or hold a very small residual. Read the fund's index methodology and its holdings file rather than trusting the label, because some total-market real estate funds do include them. If your fund holds them, you are holding a levered spread book alongside your property exposure.

A discount to book on an mREIT is a different animal. Book is a mark on financial assets that reprices daily, so the discount tells you the market disagrees with the marks, doubts the hedge book, or expects book erosion from spread widening or prepayment behavior. Tightening construction supply does nothing for that. What matters there is the spread between asset yields and repo funding costs, the shape of the curve, and how the hedges perform when rate volatility spikes.

The overlap is interest-rate sensitivity, which hits both, and it hits them through different channels. Equity REITs feel it through cap rates and refinancing costs. Mortgage REITs feel it through funding costs and the mark on the portfolio, faster and harder. If you size your sleeve assuming the two legs move together, a volatility event will teach you otherwise.

joe_delgado5 · Answer

Low teens yield on a repo-funded book is not a dividend, it is a spread trade with a dividend wrapper. I stay away.

carlos_nunez · Answer

@tender check whether your fund's methodology excludes them by SIC classification or by revenue test, because a few hybrid names own property and originate loans and end up on both sides depending on the screen. That is where the surprise weight usually hides.

Does the discount-to-NAV thesis cover mortgage REITs or only the ones that own buildings?

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