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Armour Residential REIT
Armour Residential REIT runs a ~$13B agency-only MBS portfolio, earning net-interest spreads through repurchase funding — explicitly avoiding credit risk.
Armour Residential REIT
Armour Residential REIT was founded in 2008 and went public in 2009, originating from an entity called Enterprise Acquisitions Corp. The firm was established by Daniel Staton, who remains Executive Chairman, alongside co-CEOs Scott Ulm and Jeffrey Zimmer — Ulm also serves as Chief Investment Officer. The principals previously operated under the brand name Armour Capital Management, which still acts as the external manager for the REIT. The firm concentrates exclusively on fixed-rate, agency-guaranteed residential MBS. This focus means Armour holds securities whose principal and interest are explicitly backed by government-sponsored entities, insulating it from homeowner default losses. The strategy relies on leverage to amplify returns: Armour finances acquisitions through repurchase agreements, rolling short-term borrowing against long-dated assets. Its portfolio spans 15-year, 20-year, and 30-year fixed-rate agency pools, with an emphasis on specified-pool collateral — lower-loan-balance loans or loans with geographic concentrations that exhibit more favorable prepayment behavior (per the firm's SEC filings). The geographic exposure is entirely domestic, tracking agency origination patterns across the United States. Armour has historically maintained a portfolio valued between $8B and $15B in total assets, funded by a similar magnitude of repurchase-agreement debt. The firm employs an active hedging program using interest-rate swaps and swaptions to manage duration risk. The external management structure via Armour Capital Management means the company pays a management fee to its affiliate, a cost structure common among externally managed mortgage REITs but increasingly scrutinized by investors. Total professionals, including the external manager's team, are not disclosed in a single consolidated headcount figure. Its structural differentiator is the deliberate abdication of credit risk in a sector where many peers — both internal and externally managed — have layered on credit-sensitive whole loans, non-agency MBS, and direct lending to boost yields. By restricting itself to agency paper, Armour operates as an interest-rate vehicle; its returns are driven entirely by spread income and the skill of its hedging desk rather than underwriting borrower credit, which ties its fate directly to U.S. monetary policy and prepayment modeling rather than the housing cycle.
General information
Firm type
Asset Manager
Year founded
2008
AUM
$10B–$15B (Altss estimate)
Location
Region
North America
Country
United States
City
Vero Beach
Corporate office
Vero Beach, FL, United States
Principals
Scott Ulm
Co-Chief Executive Officer & Chief Investment Officer
Jeffrey Zimmer
Co-Chief Executive Officer, President & Vice Chair
Daniel Staton
Executive Chairman
Sector focus
Frequently asked questions
Who runs investment decisions at Armour Residential REIT?
Scott Ulm serves as Co-Chief Executive Officer and Chief Investment Officer, directing the portfolio composition, hedging strategy, and repurchase-agreement funding. Jeffrey Zimmer, Co-CEO and President, oversees corporate strategy alongside Ulm. The firm is externally managed by Armour Capital Management, with Daniel Staton as Executive Chairman.
What distinguishes Armour's mortgage REIT strategy from peers?
Armour maintains a pure-play agency focus, holding only mortgage-backed securities guaranteed by Fannie Mae, Freddie Mac, or Ginnie Mae. The firm does not invest in non-agency loans, commercial mortgages, or mortgage servicing rights. This removes homeowner credit default risk from its return profile and makes the portfolio almost exclusively driven by interest-rate dynamics and prepayment speeds.
How does Armour generate income?
Armour generates income by capturing the spread between the yield on its long-term agency-guaranteed MBS and the cost of the short-term repurchase agreements used to fund them. The firm deploys leverage — typically 7x to 9x equity — to amplify this net-interest income. It uses interest-rate swaps, swaptions, and TBAs to hedge duration exposure and mitigate book-value volatility.
Is Armour internally advised or externally managed?
Armour Residential REIT is externally managed by Armour Capital Management under a management agreement. This external structure means shareholders pay a management fee to the affiliated manager, a cost center that peers with internalized management avoid. External management can create misaligned incentives around asset growth versus long-term book-value performance.
What is the significance of Armour's specified-pool strategy?
Within its agency MBS mandate, Armour targets specified pools — mortgage loans with traits like lower loan balances, specific geographic footprints, or borrower profiles that prepay more slowly than generic agency cohorts. Slower, more predictable prepayment speeds reduce the negative convexity that penalizes MBS investors when rates drop, making these pools a core risk-management tool rather than a bet on faster returns.
What is Armour's exposure to credit risk on its MBS?
Armour's exposure to credit risk is effectively zero on the MBS themselves — any defaults on the underlying mortgages are absorbed by the guaranteeing agency. The firm's primary risks are interest-rate risk (changes in the yield curve affecting the value of its portfolio), prepayment risk (borrowers refinancing faster than modeled), and funding risk (a dislocation in the repurchase-agreement market).
How does Armour manage its interest-rate and funding risk?
Armour manages these risks through a combination of asset selection (specified pools with favorable prepayment characteristics) and a formal hedging program using interest-rate swaps, futures, and options on swaps. On the funding side, the firm maintains relationships with a diversified group of repurchase-agreement counterparties to avoid over-concentration on any single funding source, a sharpened priority since the repurchase-market stress of March 2020.
Profile maintained by Altss using OSINT (open-source intelligence), regulatory filings, licensed data partners, and verified direct submissions. Read the methodology. Last updated: . Continuous refresh with full update cycles at least every 30 days.
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