AGNC vs DX: Which Is the Better Buy in 2026?
Last updated August 2026
Short answer
AGNC is the larger of the two ($12.41B market cap): the incumbent the market prices for continued execution (7.10x forward earnings, beta 1.30). DX is the smaller challenger ($3.15B), priced similarly on forward earnings (8.11x): more room to run, but more to prove. The real question is which set of drivers you believe, and whether owning one (or both) leaves you over-concentrated.
AGNC vs DX: the tie-breaker metrics
Same yardstick, side by side (as of August 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.
| Metric | AGNC | DX | What it tells you |
|---|---|---|---|
| Market cap | $12.41B | $3.15B | Size. The larger name is the incumbent; the smaller has more room to grow and more to prove. |
| Forward P/E | 7.10 | 8.11 | Valuation on next year's expected earnings, the same yardstick for both. Lower is cheaper for that growth; higher means the market is paying up. |
| Trailing P/E | 8.33 | 4.06 | Valuation on the last 12 months. A big drop from trailing to forward means the market expects earnings to jump, so more growth is already in the price. |
| Beta | 1.30 | 0.93 | Volatility vs the market. Above 1 swings harder than the index; below 1 is steadier. Higher beta means bigger drawdowns to hold through. |
| Price vs 52-week range | 47% of range | 28% of range | Where today's price sits between the 52-week low and high. Near the high is momentum with less margin of safety; near the low is out of favor or a discount, depending on why. |
| Price / book | 1.17 | 0.98 | How much you pay over book value. Very high can signal an asset-light, high-return business or a rich price. |
Before you buy: how AGNC and DX affect your concentration
The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. AGNC and DX share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.
This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined AGNC and DX exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.
What does AGNC Investment Corp (AGNC) do?
AGNC Investment Corp is a real estate investment trust that invests almost entirely in agency mortgage-backed securities, meaning residential mortgages guaranteed against credit loss by Fannie Mae, Freddie Mac, or Ginnie Mae. It uses substantial leverage, financing its portfolio in the repo market, and earns the spread between the yield on its MBS and its borrowing and hedging costs. That net spread, plus dollar-roll income, funds a monthly dividend that is the main reason most shareholders own the stock.
What does Dynex Capital (DX) do?
Dynex Capital, Inc. is a Virginia-based real estate investment trust that invests primarily in agency mortgage-backed securities (MBS) guaranteed by Fannie Mae, Freddie Mac and Ginnie Mae, along with related hedges. It borrows heavily in the repurchase (repo) market to buy these securities, earning the spread between the yield on its mortgage assets and its short-term funding costs, and it returns most of that income to shareholders as a monthly dividend. As of mid-2026 the company managed an MBS and TBA portfolio of roughly $24.8 billion against about $2.8 billion of equity, running adjusted leverage near 8.6x.
AGNC vs DX: how do they differ?
Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.
- AGNC drivers: Very high monthly dividend; Agency-MBS spreads.
- DX drivers: Falling-rate and steepening-curve tailwind; Aggressive portfolio growth and capital raising.
Which fits which kind of investor
A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: AGNC's total return is the dividend minus changes in book value, and book value is highly sensitive to interest rates and MBS spreads. For DX, book value is highly sensitive to interest rates and mortgage-spread moves, and a widening in spreads produced a negative 2.5% economic return and an $83 million net loss to common shareholders in Q1 2026.
AGNC or DX: which should you pick?
Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick AGNC if you believe its drivers more; DX if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the AGNC and DX guides.
AGNC vs DX: the full fundamentals
AGNC. Agency mortgage REITs like AGNC trade around their book value per share, so price-to-book is the key valuation lens rather than P/E. The quoted double-digit yield is real but should be read alongside book-value trends: in Q1 2026 the dividend was largely offset by a roughly $0.50 decline in tangible book value, illustrating that the yield and the principal can move in opposite directions.
DX. DX trades close to, and at times modestly above, its stated book value per share, which is typical for an agency mortgage REIT when the market expects spreads to earn attractive returns. Because REIT payout rules push most taxable income out as dividends, the eye-catching mid-teens yield reflects leverage and rate risk rather than a bargain valuation. Book value moved meaningfully quarter to quarter in 2026, so point-in-time price-to-book can shift quickly.
Headline figures (approximate, Q1 2026 (quarter ended March 31, 2026)): AGNC shows dividend yield ~14% (annualized), monthly dividend $0.12 ($1.44/yr), tangible book value/share ~$8.38, net spread + dollar roll income/share ~$0.42 (Q1); DX shows market cap ~$2.8B, revenue (ttm) ~$304M, net income (ttm) ~$231M, book value / share (q1 2026) ~$12.60.
The bottom line: AGNC vs DX
AGNC and DX are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined AGNC and DX exposure against your real portfolio. It is not an investment adviser.
Wondering how AGNC or DX fits the portfolio you already own? Walnut is an AI investing app that connects your brokerage read-only and answers questions like that about your actual holdings: overlap, concentration, and how each position tracks the S&P 500. Compare the best AI portfolio analyzers or see the best AI investing apps in 2026.
Investing in AGNC Investment Corp with AI
Connect the broker you already use and ask Walnut's AI how AGNC fits what you actually hold: whether you own it already through a fund, what it would do to your concentration, and how it has tracked the S&P 500. Read-only by default, and you approve anything before it reaches your broker.
FAQ
What is the difference between AGNC and DX?
+
AGNC Investment Corp is a real estate investment trust that invests almost entirely in agency mortgage-backed securities, meaning residential mortgages guaranteed against credit loss by Fannie Mae, Freddie Mac, or Ginnie Mae. Dynex Capital, Inc. They show up together because they share investment themes, but they are different businesses, so the better fit depends on which thesis you are expressing.
Is AGNC or DX the better stock?
+
Neither is universally better. AGNC is the larger incumbent; DX is the smaller challenger and looks pricier on forward earnings. Walnut is informational, not investment advice. Compare what each does, the tie-breaker metrics above, and the risks, then decide which fits your thesis and what you already own.
Which is cheaper, AGNC or DX?
+
On forward P/E (as of August 2026), AGNC trades at 7.10x and DX at 8.11x, so AGNC is the cheaper of the two on next year's expected earnings. A lower multiple is not automatically the better buy: a richer valuation can be justified by faster growth, and a lower one can reflect real risk. Weigh the multiple against how fast each business is compounding.
Should you own both AGNC and DX?
+
Because they share themes, owning both concentrates you in that theme. That can be intentional (a focused bet) or accidental (less diversification than it looks). Walnut can show your combined exposure across both, and whether adding either over-concentrates you, before you buy.
What are the risks of AGNC vs DX?
+
AGNC: AGNC's total return is the dividend minus changes in book value, and book value is highly sensitive to interest rates and MBS spreads. Tangible book value fell about 5.6% to $8.38 in Q1 2026, producing a slightly negative economic return for the quarter even after the dividend. The roughly 7.4x leverage amplifies moves in both directions, and the dividend has been cut multiple times over the years, so a high stated yield is not a guarantee of stable income. DX: Book value is highly sensitive to interest rates and mortgage-spread moves, and a widening in spreads produced a negative 2.5% economic return and an $83 million net loss to common shareholders in Q1 2026. High leverage near 8.6x magnifies both gains and losses on the portfolio. The dividend is not guaranteed and can be cut if spread income or book value deteriorates, as has happened across the agency mortgage REIT sector historically. Frequent equity issuance can dilute existing shareholders, and rising short-term funding costs would compress the net interest margin. As a leveraged, rate-driven vehicle, DX can lose value even when its underlying agency securities carry no credit risk.
Walnut is informational, not investment advice. This page is descriptive and not a recommendation to buy or sell AGNC or DX; figures are approximate and dated (as of August 2026). Verify current data before investing.