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What happens to a stock price on the ex-dividend date?

When a stock goes ex-dividend, its price usually drops by roughly the dividend per share. It's not a coincidence — it's arithmetic.

The basic mechanic

Up to and including the day before the ex-dividend date, a buyer of the stock is entitled to the upcoming dividend. From the ex-date onward, a buyer is not. That lost entitlement has to be reflected somewhere — and it shows up in the price. So on the ex-date the stock opens lower by approximately the dividend amount, because new buyers are no longer paying for a dividend they won't receive.

If a $50 stock is about to pay a $0.50 dividend, all else equal you'd expect it to open around $49.50 on the ex-date. In fact, most US exchanges reduce the previous day's official closing price by the dividend when setting the ex-date reference, formalising the adjustment.

Why the drop is rarely exactly the dividend

In practice the ex-date price move is only approximately the dividend, because a stock's price is also moving for every other reason at the same time — overall market direction, company news, and supply and demand. On a strong day the stock might open down less than the dividend, or even up; on a weak day, more. Historically, tax treatment has also played a role, since dividends and capital gains can be taxed differently. The dividend adjustment is a clean, predictable force acting on the price, but it is never the only one.

What it means for you

• Buyers: buying on the ex-date means you skip this dividend but pay a correspondingly lower price — you're not "missing out", just getting a different mix of price and payout.
• Sellers: if you own before the ex-date you keep the dividend even if you sell on the ex-date, but you sell at the reduced price. The two roughly offset.
• Dividend-capture traders: the ex-date drop is the whole challenge of the dividend capture strategy — the trade only wins if the price recovers past the drop.

The total-return view

The cleanest way to think about it: a dividend doesn't create value out of nothing, it moves value from the share price into your pocket as cash. Your total return — price change plus dividends — is what matters, and the ex-date drop is just the bookkeeping that keeps that honest. This is why long-term investors largely ignore the ex-date wobble and focus on total return over time.

See which stocks are predicted to go ex-dividend soon on the ex-dividend calendar. Educational information only, not financial advice.