Key Points

  • REITs must distribute at least 90% of taxable income to shareholders, which is why their dividend yields tend to run structurally higher than most stocks.
  • Funds from operations (FFO), not earnings per share, is the metric that actually measures a REIT's cash-generating power — making the standard P/E ratio misleading.
  • Equity REITs own and rent property; mortgage REITs own the debt. They behave very differently and carry very different risks.
  • The same interest-rate moves that make REIT income attractive can also make REIT prices surprisingly volatile.

A real estate investment trust, or REIT, is a company that owns income-producing property — apartments, warehouses, shopping centers, data centers, cell towers — and passes the rental income through to shareholders. For investors who want exposure to real estate without buying and managing buildings themselves, REITs offer a liquid, exchange-traded alternative. Many trade like any other stock; you can find them across major indexes and in funds like VNQ, a widely held real estate ETF.

The appeal is obvious: REITs are known for paying dividends well above the market average. But those payouts are not generosity. They are the product of a specific tax structure, and understanding that structure is the difference between treating a REIT as steady income and being surprised when the price swings.

Why the Dividends Are Structurally High

The defining feature of a REIT is a rule written into the tax code: to qualify as a REIT and avoid paying corporate income tax, the company must distribute at least 90% of its taxable income to shareholders each year. In practice most distribute close to 100%.

This is the engine behind the high yields. A normal company can retain earnings, reinvest them, or buy back stock. A REIT largely cannot hoard its profits — it is legally obligated to hand most of them back. That is why REIT dividend yields often sit far above those of typical dividend-paying stocks.

The trade-off is that REITs cannot easily fund their own growth from retained earnings. To buy new properties, they typically issue new shares or take on debt. That reliance on external capital is a recurring theme in how REITs behave — and a key reason interest rates matter so much.

Why P/E Is the Wrong Lens

If you value a REIT the way you value most companies — by its price-to-earnings ratio — you will get a distorted picture. The culprit is depreciation.

Accounting rules require companies to depreciate the value of buildings over time, treating them as a steadily wasting asset. That depreciation is a large, non-cash expense that gets subtracted from net income. But real estate often holds or gains value in the real world, so the paper depreciation can drastically understate a REIT's actual cash flow. The result: reported earnings look small, and the P/E ratio looks alarmingly high, even for a healthy REIT.

The industry's answer is funds from operations (FFO). FFO starts with net income, then adds depreciation and amortization back in and strips out gains or losses from property sales. The goal is to capture the recurring cash the properties actually throw off. A related metric, adjusted funds from operations (AFFO), goes further by subtracting routine capital spending needed to maintain the buildings.

For REITs, price-to-FFO is the more meaningful valuation multiple, and the payout ratio is better judged against FFO than against earnings per share. If a REIT is paying out more than it generates in FFO, that dividend may not be sustainable — a warning sign the P/E ratio would never reveal.

Equity REITs vs. Mortgage REITs

Not all REITs own buildings. The category splits into two very different businesses.

Equity REITs

Equity REITs own and operate physical property, collecting rent from tenants. This is what most investors picture: an owner of apartment complexes, industrial warehouses, or office towers. Their income depends on occupancy rates, rent growth, and the health of the sectors they serve. The bulk of the REIT market falls into this group.

Mortgage REITs

Mortgage REITs (often called mREITs) don't own buildings — they own the debt. They invest in mortgages and mortgage-backed securities, earning money on the spread between the interest they collect and their own cost of borrowing. This is a fundamentally different, more leveraged model. Mortgage REITs can offer eye-catching yields, but they are far more sensitive to interest-rate shifts and credit conditions, and their payouts can be less stable.

Lumping the two together is a common mistake. A conservative income investor and a mortgage REIT are often a poor match, even though both wear the REIT label.

The Interest-Rate Sensitivity That Turns Income Volatile

The biggest surprise for many REIT investors is how much the share prices move with interest rates. "Safe income" can feel anything but safe when rates are climbing.

There are several reasons for this sensitivity. First, REITs compete with bonds for income-seeking investors. When interest rates rise, newly issued bonds and other safer instruments start offering higher yields, and REITs must offer more competitive yields to stay attractive — which often means their prices fall.

Second, REITs carry meaningful debt to finance their properties. When borrowing costs rise, refinancing existing loans and funding new acquisitions becomes more expensive, squeezing cash flow and slowing growth.

Third, because REITs distribute most of their income and rely on issuing shares to grow, higher rates raise their overall cost of capital and can make expansion harder to justify. Mortgage REITs feel rate moves most acutely, since their entire business is built on the spread between short-term borrowing and longer-term assets.

The result is an asset class that pays generous, relatively predictable income while its market price can swing with the rate cycle. That combination is not a flaw — it is simply the nature of the instrument.

Weighing the Trade-Off

REITs offer something genuinely useful: a liquid way to own income-producing real estate and collect the rent as dividends, backed by a legal structure that forces those payouts. But the same features that generate the yield — the 90% distribution rule, the reliance on outside capital, the leverage — are exactly what make REITs sensitive to interest rates and dependent on metrics like FFO rather than headline earnings.

For an investor, the practical takeaways are to read valuation through FFO rather than P/E, to know whether a REIT owns property or debt, and to expect price volatility even when the income stream itself holds steady. The dividends are real. So is the fine print.