Most yield numbers you see use trailing 12-month total dividends — including any one-off specials. That can make a stock look generous when in fact the recurring income is much smaller. The fix is two yields, not one: TTM yield for what you actually got, forward yield for what you can count on.

The Two Yields, Side by Side

TTM
Trailing-12-month yield
Sum of every dividend paid in the past 12 months — regular + specials — divided by current price. Reflects historical income; can be inflated by a one-time special that won't repeat.
FWD
Forward yield
Annualised current declared regular dividend rate, divided by current price. Excludes specials by design. Closer to what you can model into next year's income.

The Costco Lesson

Costco occasionally pays large special dividends ($7-$10 per share) on top of its modest regular. In a year following a special, TTM yield can show ~3% even though the recurring forward rate is ~0.7%. A new investor reading TTM yield in that window thinks they're buying a 3-percent yielder; the next year's income is closer to 0.7%. Same dividend page, same ticker, completely different income outlook.

Specials are often signals about past capital generation, not commitments about future capital return. A company that paid a $5 special last year is not promising another. Forward yield strips this back to what management has committed to and is the more conservative anchor.

When Each Yield Is the Right One

  • Income planning — use forward yield. You should not budget on the assumption that a one-time special will repeat.
  • Total return back-test — use TTM. Backwards-looking analysis should reflect what cash actually showed up, including specials.
  • Comparing dividend stocks — use forward. Two stocks with similar TTM yields can have very different forward yields if one of them had a special; comparing forwards normalises the picture.
  • Calling a stock "a high-yielder" — use forward. The label should describe the recurring income, not a one-time event.

The Quick Cross-Check

For any high-yield stock, compute both numbers. If TTM and forward are within 10% of each other, the dividend is regular and the headline yield is trustworthy. If TTM significantly exceeds forward, dig into the dividend history page — the gap is almost always a special, and your real income picture is the forward number.

TTM = what you got · includes specials · FWD = what you can count on
Use forward for income planning and like-for-like comparison
TTM >> forward = special in the trailing window — check the dividend history

See TTM + forward yield in the calendar →