Dividend yield is widely used as a screening measure and it behaves in ways that catch people out, because it is a ratio and both parts move.
This explains the mechanics rather than recommending anything. Investment decisions warrant regulated advice.
How yield is calculated
Annual dividend per share divided by the share price, expressed as a percentage.
Which means it rises when the dividend rises and also when the price falls.
The second of those is the source of most misunderstanding. A high yield frequently reflects a fallen price rather than a generous distribution, and a falling price generally reflects expectations that something is wrong.
Which is why very high yields warrant investigation rather than enthusiasm, and why the phrase describing this pattern exists in the industry.
Historic and forward yield
A distinction worth checking.
Historic yield uses dividends already paid. Forward yield uses a forecast.
Forecasts can be wrong, and dividends can be reduced or suspended, which is what happens when the reason for the fallen price materialises.
Screening tools frequently display one without making clear which, and the difference matters.
Cover and sustainability
The measures that address whether a dividend is likely to continue.
Dividend cover compares earnings to the dividend, indicating how much room exists before the payment exceeds what is being earned.
Payout ratio expresses the same relationship the other way round.
Cash flow measures are frequently more informative than earnings, since dividends are paid in cash and earnings include non-cash items.
And debt levels matter, since a heavily indebted company has obligations ranking ahead of shareholders.
Total return
The measure that avoids the yield problem.
Total return combines income and capital change, which is what an investor actually experiences.
Which means a company paying nothing and growing, and one paying a large dividend and not growing, can produce the same total return.
Comparing on yield alone therefore compares one component and ignores the other, which is why performance data is generally presented on a total return basis.
Reinvestment
Where the compounding discussion applies.
Dividends reinvested purchase additional shares, which themselves produce dividends, which compounds.
Historical analyses of long-run equity returns consistently find that reinvested income accounts for a very large proportion of total return over extended periods.
Which is a substantial finding and it depends on reinvestment actually happening, since dividends taken as income do not compound.
Tax treatment
Which varies enormously and affects the comparison.
Dividends and capital gains are frequently taxed differently, at different rates, with different allowances.
Which means the same total return can produce different after-tax outcomes depending on its composition.
Tax-advantaged accounts change this again, and the rules are jurisdiction-specific, which makes this a matter for a qualified adviser rather than for general reading.
The dates that matter
Practical mechanics worth knowing.
The ex-dividend date determines eligibility. Buying on or after it means not receiving the declared dividend.
The price generally adjusts downward by approximately the dividend amount on that date, which means buying just before to capture a dividend does not produce a free return.
This is frequently misunderstood, and the adjustment is a mechanical consequence of the company distributing cash rather than a market reaction.
What yield is actually useful for
Being fair to the measure.
As one input among several when comparing similar companies in the same sector.
As an indicator of a management approach, since a long record of maintained or increased distributions says something about how a company is run.
And for somebody who requires income specifically, where the composition of return matters practically rather than only arithmetically.
What it is not useful for is ranking investments generally, which is how it is most commonly used.
Distributing and accumulating share classes
A practical distinction in funds worth understanding.
Distributing classes pay income out. Accumulating classes retain and reinvest it within the fund.
The underlying holdings are identical; only the treatment of income differs.
Which means an accumulating class handles the reinvestment automatically, and a distributing class requires the holder to reinvest if compounding is the objective.
Tax treatment of the two differs in many jurisdictions even where the economic outcome is similar, which is a point for a qualified adviser rather than for general reading.
Withholding tax on foreign income
A cost that reduces income from overseas holdings and is easy to miss.
Many countries deduct tax at source from dividends paid to non-residents, at rates that vary.
Treaties between countries frequently reduce the rate, and claiming the reduction sometimes requires action rather than being automatic.
Whether the deduction can be offset against domestic tax depends on the jurisdiction and the account type.
Which means the headline yield on a foreign holding may not be what is received, and the difference is worth establishing.
Buybacks as an alternative
Worth understanding since it is a substitute for distribution.
A company returning capital by repurchasing its own shares reduces the number outstanding, which increases each remaining holder's proportionate claim.
The economic effect is comparable to a dividend, and the tax treatment frequently differs, which is part of why some companies prefer it.
Which means yield alone understates capital returned by companies favouring buybacks, and total shareholder return measures including both are the more complete comparison.