Earnings yield vs bond yield: when expensive shares need to work harder

A useful comparison, not a simple verdict

When government bond yields rise above the earnings yields of many large companies, shares can start to look expensive by comparison.

That does not automatically make bonds superior. Nor does it mean a stock market fall is imminent. It means investors should examine how much future growth is already reflected in share prices.

The comparison is useful because it forces us to ask a basic question: what extra return might justify accepting the greater uncertainty of company earnings?

What is an earnings yield?

A company’s earnings yield measures its earnings relative to its share price. It is the inverse of the price-to-earnings ratio:

Earnings yield = earnings per share ÷ share price

It can also be expressed as:

Earnings yield = 1 ÷ P/E ratio

A share trading on 20 times earnings therefore has an earnings yield of 5%. At 25 times earnings, the yield falls to 4%.

This does not mean shareholders receive that percentage in cash. Some earnings may be paid as dividends, while the rest may be retained for investment, acquisitions, debt reduction or share buybacks.

The figure is better understood as a valuation snapshot. It shows how much current annual profit sits behind each pound or dollar invested at today’s price.

Why a bond yield is different

A government bond is a debt instrument rather than an ownership stake in a business. Its return comes from contractual payments and the repayment of principal, assuming it is held to maturity and payments are made as promised.

US Treasury securities are backed by the full faith and credit of the US government, according to TreasuryDirect’s guide to marketable securities.

Bond prices can still move before maturity. If market interest rates rise, existing fixed-rate bonds generally become less attractive and their market prices can fall. A bond’s quoted yield is therefore not the same thing as a risk-free promise that its market value will remain stable.

Investors wanting to monitor US government yields can use the Federal Reserve’s H.15 selected interest rates release.

Why investors accept lower earnings yields

Unlike a bond’s fixed cash flows, company earnings can grow.

A business might reinvest its profits, increase sales, improve margins, raise prices or reduce its share count. If those actions lift future earnings per share, today’s apparently modest earnings yield could become more attractive over time.

Consider two simplified businesses.

Company A has a 4% earnings yield but can grow earnings per share consistently. Company B has a 7% earnings yield but operates in decline and may suffer falling profits. Company A could ultimately produce the better result despite looking more expensive at first glance.

This is why comparing yields without examining the businesses behind them can be misleading. A low earnings yield might reflect excessive optimism, but it can also reflect genuinely strong economics and credible growth prospects.

The difficulty is deciding how much growth is realistic and how much has already been priced in.

The growth premium raises the bar

A highly valued company does not merely need to grow. It usually needs to grow enough to justify the price investors have already paid.

That creates three important risks.

First, earnings may disappoint. Sales growth can slow, costs can rise and competitive advantages can weaken.

Second, the valuation itself may contract. Even if earnings increase, shareholders can experience poor returns when the P/E ratio falls sharply.

Third, attractive bond yields increase the competition for investors’ money. When government debt offers a higher yield, investors may demand stronger prospective returns before accepting equity risk.

The lower a share’s earnings yield relative to the bond yield, the more its valuation may depend on future growth, durable profitability and continued investor confidence.

Questions to ask before paying a premium

Rather than using one valuation ratio as a market-timing signal, investors can work through a broader checklist:

1. How dependable are the earnings? Profits supported by recurring demand may deserve more confidence than unusually high or cyclical earnings.
2. What growth is implied? A demanding valuation can require many years of expansion. Small changes to those assumptions may materially affect the investment case.
3. Can the company reinvest well? Retained earnings create value only when management can deploy them at worthwhile rates of return.
4. How strong is the balance sheet? Debt can magnify the effect of higher financing costs or weaker trading.
5. What could reduce the valuation? Slower growth, tougher competition and persistent interest rates can all change what investors are willing to pay.
6. Is the portfolio concentrated? A collection of expensive companies exposed to similar expectations may offer less diversification than the number of holdings suggests.

The same framework can apply across sectors. Property companies, for example, require investors to consider operating income alongside financing costs and asset valuations. Those moving parts can be seen in analyses of SEGRO’s rent growth and property valuation and Tritax Big Box’s rental growth and expansion plans.

Avoid treating the comparison as a timing tool

Valuation matters, but it offers little precision about what markets will do next.

Expensive shares can remain expensive while earnings catch up. They can also become more expensive. Equally, a high earnings yield can signal genuine value or a market expectation that profits are about to decline.

That makes wholesale portfolio changes based on a single comparison risky. A more durable response is to review assumptions, test the effect of lower growth and consider whether one market, sector or investment style has become too dominant.

Higher bond yields make selectivity more important

The earnings-yield comparison is best treated as a hurdle-rate exercise.

When government bond yields are competitive, companies with low earnings yields need to offer something more: credible growth, resilient profits, effective reinvestment or another source of long-term value creation.

That does not prove shares are unattractive. It does mean investors are paying today for results that still need to arrive. The wider the gap, the more carefully those expectations deserve to be tested.