Cap Rates, Cost of Capital, and What Actually Sets Commercial Property Values

Capitalization rates are a shorthand, not a mechanism. A cap rate is simply net operating income divided by price — a description of a transaction after it happens. What determines where transactions happen is the cost and availability of capital, and the return that the marginal buyer must earn on the equity that sits behind it.

The debt market sets the floor. When lenders quote a coupon and a proceeds level, they define the leverage-neutral price at which a buyer can still generate a positive spread. If a stabilized asset produces a six percent yield and the available debt costs six and a half percent, leverage is dilutive, buyer demand thins, and pricing must adjust until the arithmetic works again. This is why cap rates track the ten-year Treasury and credit spreads more closely than they track local rent growth.

Net operating income is the other half of the equation, and it is the half sellers can influence. Buyers underwrite the NOI they believe is durable, not the NOI reported on a trailing statement. Below-market leases, expiring concessions, unreimbursed operating expenses, deferred maintenance, and tenant credit quality are all adjustments made in the buyer's model before a price is offered.

Cap rate compression and expansion are consequences, not strategies. A period of compression rewards owners who were already invested; it does not reward the underwriting that assumed it. We advise clients to underwrite exit cap rates at or above entry, treat any compression as an unearned outcome, and build returns from income growth and capital structure rather than from a forecasted change in market sentiment.

Spread to the risk-free rate is the discipline that survives cycles. Historically, stabilized commercial assets have traded at a meaningful premium to Treasuries to compensate for illiquidity, management intensity, and capital expenditure risk. When that spread compresses toward zero, the asset class is being priced for perfection. When it widens sharply, capital that can move quickly is being paid to do so.

Different property types carry structurally different spreads for defensible reasons. Industrial and grocery-anchored retail have benefited from durable tenant demand. Multifamily prices tightly because of agency debt availability. Office pricing has bifurcated between trophy assets and everything else. Cap rate comparisons across property types without adjusting for capital availability are close to meaningless.

The practical implication for owners is straightforward: track the debt markets, not the headlines. When quoted loan proceeds and coupons move, transaction pricing follows within a quarter or two. Owners who understand that sequence can time a disposition into strength rather than react to a repricing that was already visible in the credit markets.