Yield

In finance, yield is the income an investment produces expressed as a percentage of its cost or current market price. A stock that pays two dollars a year in dividends and trades at fifty dollars has a dividend yield of four percent. A bond that pays fifty dollars of interest a year and is priced at one thousand has a current yield of five percent. Yield turns an absolute income figure into a rate, so investments of different sizes and prices can be compared on how much return they throw off per dollar committed. Because yield is measured against price rather than face value or original cost, it moves as the price moves — a crucial feature for anyone comparing income across assets. The term spans dividend yield on shares, interest or coupon yield on bonds, and yield on savings and other income-producing assets.

The most important behavior of yield is its inverse relationship with price. For a fixed income stream, when the price of the asset falls, its yield rises, and when the price rises, its yield falls, because the same income is measured against a smaller or larger price. A bond paying a fixed coupon yields more when its price drops and less when it climbs. This is why bond yields and bond prices move in opposite directions, and why yield is such a widely watched signal. Yield also comes in refined forms — yield to maturity on a bond folds in the gain or loss to par as well as the coupons, giving a fuller measure of total return than current yield alone. Read yield as return per unit of price, and remember it is a rate, not a guaranteed amount.

Yield and return are related but not the same, and conflating them causes real errors. Return, in the fullest sense, includes both the income an asset pays and the change in its price — total return. Yield usually captures only the income component as a percentage of price, leaving out capital gains or losses. A stock might have a modest dividend yield of two percent yet deliver a total return of fifteen percent once its price appreciation is counted, or a negative total return despite a positive yield if the price fell far enough. So yield answers "how much income does this throw off relative to its price?" while return answers "how much did I make in total, income plus price change?" A high yield is not the same as a high return, and chasing yield alone can lead an investor into assets whose prices are falling for good reason.

The word yield also has a distinct advertising sense worth naming so it is not confused with the financial one. In advertising and publishing, yield refers to the revenue a publisher earns per unit of ad inventory — often revenue per thousand impressions — and yield management or yield optimization is the practice of maximizing that revenue across available inventory. The shared idea is output per unit of a scarce resource, but the finance sense measures income relative to an investment's price, while the ad sense measures revenue relative to inventory sold. This page centers on the financial meaning, which is the one that governs bonds, dividends, and income investing. When you see "yield" in a martech or programmatic context, read it as ad yield — revenue per impression — not as an investment return.

Yield — an investment's income as a percentage of its price — measures return per dollar and moves inversely with price, distinct from total return and from advertising ad-yield.

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