Before buying a mortgage stock, identify what the company owns, how it funds those assets, and how much loss its balance sheet can absorb. A bank with mortgage exposure and a mortgage REIT can both be affected by housing and interest rates, but their funding, leverage, and valuation measures differ. The checks below help you assess a particular issuer; they do not establish that any stock is a buy.
First identify the kind of mortgage company
“Mortgage stock” is a broad label, not a business model. A bank may make or hold mortgages alongside other loans and securities, funding its balance sheet largely through deposits and other bank sources. A mortgage REIT may own mortgage-backed securities or mortgage loans and finance them through repurchase agreements (repos), securitizations, or other secured borrowing. Those differences affect what to inspect and which valuation measures make sense.
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| What to compare | Bank with mortgage exposure | Mortgage REIT |
|---|---|---|
| Main questions | How sound are the loans and securities, how stable is funding, and how much capital is available to absorb losses? | What assets does it own, how are they financed, and can its equity withstand asset-value changes and collateral demands? |
| Useful valuation starting point | Price to book value and price to tangible book value, considered with earnings, capital, and asset quality. | Share price compared with reported book value per share, considered with asset marks, leverage, financing costs, and credit losses. |
| Key earnings lens | Net interest income and margin, provisions for credit losses, and mortgage banking or servicing income where relevant. | Asset yields relative to funding costs, hedge results, realized and unrealized gains or losses, credit losses, and distributions. |
These are starting points, not a mechanical ranking system. The Federal Reserve and FDIC provide bank-sector context, while a company’s filings explain its own assets, funding, and risk measures. Bank and mortgage REIT accounting and portfolio structures differ, so a single metric or fair-value multiple cannot be applied to every issuer.
Check credit quality beyond one delinquency figure
A delinquency rate is only one view of potential losses. Look at how performance changes over time and how the company defines each measure: early-stage past-due loans are not the same as nonaccrual loans, defaults, charge-offs, or losses after recoveries. Review provisions and reserves or credit-loss allowances alongside those trends; a low current delinquency figure does not, by itself, establish that expected losses are fully reflected.
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For a bank
Read the loan portfolio tables and disclosures on nonperforming or nonaccrual assets, charge-offs, and the allowance for credit losses. Separate mortgage loans from other loan categories, then check whether balances are concentrated by property type, borrower, geography, or loan vintage. A bank’s overall loan metrics may conceal different trends within its mortgage portfolio.
For a mortgage REIT
Identify whether the REIT holds agency mortgage-backed securities, credit-sensitive securities, whole loans, or a mix. Then examine the credit quality and collateral behind its holdings, delinquency or default trends where applicable, risk ratings, credit-loss allowances, and any real-estate-owned assets. The relevant credit checks depend on the assets: a portfolio of mortgage securities is not assessed in exactly the same way as a portfolio of loans it originated or acquired.
Trace funding, not just its stated cost
Funding can become a source of pressure even when assets continue to perform. Assess both the price of funding and how dependable it is, including what happens if lenders or depositors withdraw, terms reset, or collateral values fall.
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For a bank
Review deposit composition and stability, deposit costs, wholesale-funding reliance, liquidity, and net interest margin. Where disclosed, note uninsured and brokered deposits as part of the broader funding picture rather than treating either category alone as a verdict on safety. The Federal Reserve describes wholesale funding as potentially more costly and less stable than core deposits. The 2026 FDIC Risk Review, updated April 22, 2026, reports that wholesale funding declined as banks reduced Federal Home Loan Bank borrowings and brokered deposits during 2025; this is sector context, not evidence about an individual bank.
For a mortgage REIT
Follow the funding chain in the filing: repos, warehouse facilities, securitizations, and other borrowings. Check lender or counterparty concentration, maturity and renewal terms, collateral requirements or haircuts, and whether obligations are recourse or nonrecourse. Ask whether the company has enough available liquidity to meet collateral calls without selling assets at unfavorable prices. A low quoted borrowing cost is not reassuring if funding is short-term, concentrated, or dependent on collateral that can lose value.
Understand leverage and the loss-absorbing buffer
Leverage magnifies both gains and losses, but reported ratios may use different definitions. Read the company’s definition and the date attached to the figure before comparing it with another issuer. For banks, consider regulatory capital and tangible equity alongside liquidity and exposures to losses on loans or securities. For mortgage REITs, inspect leverage, recourse exposure, the equity buffer, hedging, and the ability to meet collateral demands as asset values move.
AGNC Investment Corp.’s 2025 Form 10-K reported a 7.2x tangible-net-book-value-at-risk leverage ratio at December 31, 2025. That is one company’s disclosed measure on that date, not a sector norm, target, or recommendation. Compare ratios only after confirming that the companies define them on a comparable basis.
Interpret book value in the context of the assets
For a bank, compare market price with both book value and tangible book value where available. For a mortgage REIT, compare share price with book value per share. A discount or premium is a prompt to investigate, not proof that a stock is cheap or expensive: reported book value can be affected by asset marks, credit allowances, leverage, and portfolio structure.
Connect the valuation to the earnings engine. For banks, assess whether net interest income and margin, mortgage-related income, provisions, and operating costs support the company’s earnings power. For mortgage REITs, examine asset yields against funding costs and consider hedge results, realized and unrealized changes, and credit losses. If the company presents non-GAAP measures, reconcile them with GAAP figures and understand what is excluded before relying on them.
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A distribution is not a substitute for this analysis. For a mortgage REIT, evaluate whether earnings and cash flows support the distribution under the company’s funding and asset conditions; do not infer sustainability from the current payout alone. For either business type, the available valuation measures do not establish a universal “right” price-to-book multiple.
Test how rates and stress could affect both sides of the balance sheet
Interest-rate changes can affect asset values and funding costs differently. They can also alter bank margins, refinancing and prepayment behavior, and the effectiveness of a mortgage REIT’s hedges. Read the issuer’s own interest-rate risk discussion and sensitivity analysis, noting the assumptions and scenarios used. Do not assume that two mortgage-related stocks will respond alike simply because both have exposure to housing or rates.
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Pair rate sensitivity with credit and funding stress: consider whether weaker asset values, higher borrowing costs, or collateral calls could coincide, and whether the company describes enough capital or liquidity to manage them. The answer depends on the issuer’s portfolio and financing, so broad market statistics cannot stand in for the company’s disclosures.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Use sector statistics as context, not as a company verdict
The Federal Reserve Board’s “Banking System Conditions,” published June 11, 2026, reports that aggregate commercial-bank deposits reached $19.5 trillion in February 2026. It also reports that total loan delinquency for commercial banks was 1.6% at year-end 2025, below a long-run historical average of about 3%. These figures describe commercial banks overall, not a particular mortgage lender, mortgage portfolio, or mortgage REIT.
The FDIC’s 2026 Risk Review describes bank funding, interest-rate, and credit risks during 2025. It characterizes credit risks as generally contained while noting ongoing weaknesses in commercial real estate and some consumer loan types. Those broad observations can help frame questions, but only issuer disclosures establish a company’s own concentrations and performance.
Quick Recap
A practical order for reviewing an issuer
- Classify the business. Identify the company’s major asset types and whether it is a bank, a mortgage REIT, or another mortgage-related business.
- Read current filings. Start with the latest annual and quarterly reports. Focus on risk factors, portfolio tables, credit-loss allowance disclosures, funding and liquidity discussion, leverage definitions, and interest-rate sensitivity analysis.
- Track credit over time. Compare delinquencies, nonaccruals, defaults, charge-offs, reserves, and recoveries using the company’s definitions. Check for property, borrower, loan-vintage, or geographic concentrations.
- Map assets to funding. For a bank, evaluate deposits, wholesale funding, liquidity, and funding costs. For a mortgage REIT, review repo or securitization terms, recourse, collateral needs, counterparties, and liquidity for potential margin calls.
- Assess resilience and earnings quality. Read the company’s rate and credit sensitivity disclosures, review how earnings are generated, and reconcile non-GAAP measures with GAAP where applicable.
- Only then assess valuation. Compare price with the appropriate book-value measure in light of asset marks, reserves, capital, leverage, profitability, and any distribution’s support.
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