Twenty times earnings is a 5% earnings yield. Put it beside a hypothetical 4% nominal US Treasury yield, and you get a tidy one-point gap. Does that mean stocks offer an extra 1% for taking the risk?
The arithmetic works. The conclusion skips a step.
The 5% describes company profit relative to its share price. It does not tell you what you will collect or what the share will sell for. Turning a profit ratio into a return forecast takes more than subtraction.
Turn P/E upside down
Earnings yield is annual earnings per share (EPS) divided by the share price. Just as free cash flow yield reverses P/FCF, it flips P/E upside down on the same earnings basis.
At a P/E of 20, that is 1 ÷ 20 = 0.05, or 5%: $5 of annual company earnings for every $100 of share price. Changing the fraction does not change the business.
Harbor Coffee, our fictional coffee business, reported FY3 diluted EPS of $3.00. At its $66 year-end price, the trailing earnings yield is $3.00 ÷ $66 × 100% ≈ 4.55%.
Three shares cost $198 and represent $9 of FY3 profit. You own a claim on those earnings; Harbor has not promised to deposit $9 in your account.
Harbor's consensus estimate for next year's diluted EPS is $3.24. At the same $66 price, the forward yield is $3.24 ÷ $66 × 100% ≈ 4.91%. Like forward P/E, it rests on a forecast. The higher yield comes from expected earnings, without any fall in price.
What the yield gap leaves out
Subtract the two opening yields: 5% − 4% = 1 percentage point. That is an earnings-yield spread, the gap between an accounting yield and the chosen bond yield.
Your stock return comes from dividends and price changes. Earnings can grow or shrink, and money kept in the business can fund successful expansion or wasted spending. The same 5% earnings yield can sit behind very different future returns.
Even the bond side needs a label. Nominal rates leave inflation in; real rates adjust for it.
The Fed's April 2024 Financial Stability Report used forward earnings yield minus an expected real ten-year Treasury yield as a premium proxy. That differs from our nominal-yield subtraction. Two charts called a “yield gap” can be answering different questions.
Expected, historical, or implied?
The equity risk premium, or ERP, is the extra expected total return on a broad stock market above a specified risk-free benchmark.
Suppose you expect the broad market to return 8% over the next year, while a one-year Treasury held to maturity pays 3%. Both returns are nominal, in US dollars, before fees and taxes. The expected premium is 8% − 3% = 5 percentage points.
You can expect an extra return and still lose money. The premium is the reward sought for bearing uncertainty.
A historical premium starts with returns investors actually earned. It compares stock total returns with the benchmark's returns over the same past period. Change the years, the market, the benchmark, or the averaging method and the answer changes.
An implied premium starts with the market price and forecasts of future cash for shareholders. A model works backward to find the return that fits that price, then subtracts the risk-free rate. Change the cash forecast and the implied premium can change even while the price stays still.
| Measure | What it uses | What it is not |
|---|---|---|
| Earnings yield | Annual EPS ÷ price | A cash payout |
| Historical ERP | Stock − benchmark returns | A future promise |
| Implied ERP | Prices and cash forecasts | A measured past return |
A market-wide premium does not give every stock the same expected return. Harbor has its own business risks.
Why a changing premium moves prices
Investors can demand more compensation before a company earns a dollar less. Greater uncertainty, or less willingness to bear it, can raise the premium they require.
Asking for a larger return cannot make the company produce more cash. The flow shows the adjustment: investors pay less for the same expected future payments.
A higher premium can hurt the investor who already owns the shares while raising the expected return for someone buying at the lower price. Expected return starts from the price you pay.
The opening gap now has a name: a 1-percentage-point earnings-yield spread. Turning it into an ERP estimate requires assumptions that connect earnings, payouts, growth, and prices to expected total returns.
Optional: a premium through time
Aswath Damodaran's historical implied-premium series uses the S&P 500 and a nominal Treasury benchmark. Its estimate was 2.05% at the end of 1999 and 6.43% at the end of 2008. The line includes every annual observation from 1961 through 2024.
These are past estimates of expected premiums, not premiums investors actually earned. The series depends on a model; it is neither an official benchmark nor a stock-selection rule. A fixed premium in a valuation is an assumption you supply.
The time value of money explains the price arithmetic. For optional depth, the discount-rate lesson connects a market premium to a company's required return.
In short
- Earnings yield is the reciprocal of P/E on the same earnings basis.
- A 1-percentage-point earnings-yield spread does not promise 1% of extra stock return.
- ERP is an expected extra total return above a stated risk-free benchmark.
- Historical ERP looks at realized returns; implied ERP comes from prices and a cash-flow model.
- A higher required premium lowers value when expected cash flows and the risk-free rate stay fixed.