Buying right before the ex-dividend date and selling right after aims to collect the dividend alone — but the strategy only works if the ex-dividend price drop and short-term tax bite are smaller than the dividend itself.
How it works
The dividend, taxed at short-term rates since the shares aren’t held long enough for favorable treatment, gives the after-tax dividend. Subtracting the expected ex-dividend price drop gives the net return per share, and dividing by the share price gives the return percentage.
What this does not include
This does not include trading costs, bid-ask spread, or the fact that the ex-dividend price drop in real markets doesn’t always equal the dividend exactly — it can be larger or smaller depending on market conditions and tax-driven trading behavior around the ex-date.
How to use this calculator
- Enter share price, dividend per share, expected ex-dividend price drop, and your short-term tax rate.
Frequently asked questions
Why is the dividend taxed at short-term rates in this strategy?
Because the shares aren’t held long enough to meet the holding-period requirement for qualified dividend treatment, so the dividend is taxed as ordinary income at the investor’s regular marginal rate.
Why doesn’t this strategy always work even when the math looks favorable?
Market efficiency tends to price the expected price drop close to the dividend amount, and transaction costs plus the short-term tax hit often erase whatever small edge might otherwise exist.
Is dividend capture considered a sound long-term strategy?
Most academic and practitioner analysis is skeptical — the theoretical edge tends to be thin or negative once realistic price drops, taxes, and trading costs are all accounted for.
