Treasury Yield

A Treasury yield is the annualized rate of return on a debt security issued by the United States Treasury. It is not simply the security's stated interest rate; it is the return measured against the price actually paid, so it reflects both the interest the security pays and the discount or premium at which it was bought. Because Treasuries are backed by the full faith and credit of the United States and trade in the deepest bond market in the world, their yields serve as a benchmark, a reference rate against which other borrowing costs and investment returns are measured.

The single most important relationship to understand is that yields move inversely to prices. A Treasury security pays fixed amounts, so if its market price falls, those fixed payments represent a larger return relative to the lower price, and the yield rises; if the price rises, the yield falls. This is why financial news reports Treasury yields rising when Treasury prices are falling, and vice versa. This page covers the yield and the yield curve. The mechanics of the underlying securities, their maturities, how they are bought at auction, and inflation-protected versions, are covered on the Treasury bill, Treasury bond, and Treasury inflation-protected securities pages.

It helps to separate two yield measures that get blurred together. The current yield is a security's annual interest divided by its current market price, a simple snapshot: the SEC's investor materials give the example of a bond with a $1,000 market price paying $80 a year having an 8 percent current yield. The yield to maturity is the more complete figure, the total return an investor earns if the security is held to maturity, counting every interest payment and the difference between the purchase price and the face value repaid at the end. Yield to maturity is a projection rather than a promise, because it assumes interest can be reinvested at the same rate, which may not hold; still, it is the number most often meant by "the yield" on a longer security.

The yield curve is the second half of the subject. It is a plot of Treasury yields against their maturities at a single moment, from the shortest bills to the 30-year bond. The U.S. Treasury constructs and publishes a daily par yield curve from market quotes on the most recently auctioned securities at each maturity. In a normal curve, longer maturities yield more than shorter ones, compensating investors for tying up money longer and for the greater price sensitivity of long bonds. When that ordering reverses, so that shorter-term yields exceed longer-term ones, the curve is described as inverted.

An inverted yield curve draws attention because of its record as a recession indicator, but the claim has to be stated carefully. The Federal Reserve Bank of New York's research, which pioneered using the curve as a leading indicator, measures the "term spread" as the difference between the 10-year and 3-month Treasury rates and notes that since 1960 an inversion on that measure has preceded every U.S. recession on record. It also cautions that different spreads behave differently, that the 10-year-minus-2-year spread may invert earlier than the 10-year-minus-3-month spread, and that the level of the spread, sustained over time, forecasts better than a brief one-day move. In other words, a claim that "the yield curve inverted" is incomplete without saying which spread, and a single day's inversion means less than one that persists. The curve is a genuinely useful signal, not an infallible one: it has produced a false alarm, and the lead time between an inversion and any downturn has been long and variable.

For a household, Treasury yields matter even for people who own no Treasuries. They set the floor under other interest rates: mortgage rates, corporate bond yields, and the rates on savings vehicles all take their cue from where Treasury yields sit, and rising yields also change how investors value stocks, since a higher risk-free return raises the bar every other investment is compared against. Watching Treasury yields is, in effect, watching the price of safe money, which ripples through nearly every other financial decision.

A Treasury security's yield is determined in the market rather than fixed at issue. The security pays set amounts, its coupon interest and its face value at maturity, but its price changes as it trades, and the yield is whatever return those fixed payments represent at the current price.

A worked example shows the inverse relationship. Suppose a Treasury note with a $1,000 face value pays a 3 percent coupon, or $30 a year. If an investor buys it for $960, the current yield is $30 divided by $960, which is about 3.13 percent, a bit above the coupon rate because the note was bought below face value. Now suppose rising interest rates push the note's market price down to $900. The coupon is still $30, but the current yield is now $30 divided by $900, about 3.33 percent. The payment never changed; the yield rose only because the price fell. Run it the other way, a price rise to $1,050 lowers the current yield to about 2.86 percent, and the inverse relationship is complete. The figures are hypothetical, and yield to maturity would refine them by including the face value repaid at the end, but the core mechanism, price down means yield up, is what the arithmetic demonstrates.

Why Treasury yields are watched

• They are a benchmark for the whole financial system, influencing mortgage rates, other bond yields, and how stocks are valued.
• The yield curve's shape is a widely used, historically informative signal about the direction of the economy.
• Treasury yields represent a return on the safest dollar-denominated debt, a useful baseline for judging every riskier investment.

What to keep in mind

• A yield is not a fixed promise. Yield to maturity assumes reinvestment at the same rate, and a security sold before maturity can return more or less as its price moves.
• The inverted-curve recession signal is probabilistic, not certain: it has given a false alarm, the lead time is long and variable, and which spread is measured matters.
• Rising yields mean falling prices for existing bonds, so a jump in yields imposes a loss on someone holding a bond they must sell early.
• A single day's move in yields is noise; the durable signal is the level of a spread sustained over time.