Educational only, not tax, legal, or financial advice. Rules vary by broker and situation — verify specifics with your broker or a professional.
The ex-dividend date is the cutoff for owning a stock to receive its next dividend — buy on or after it and you miss this dividend. The price typically drops by roughly the dividend amount that day, which is why options traders care.
What it means
To get a dividend, you must own shares before the ex-date. On the ex-date, the stock usually opens lower by about the dividend amount (the value is leaving the stock and going to holders). This is a mechanical, expected drop — not a sell-off — but it affects option pricing and behavior around the date.
Why options traders care
Two reasons: (1) the expected price drop is baked into option prices approaching the ex-date; (2) it’s the trigger for dividend risk — deep-ITM call holders may exercise early just before the ex-date to capture the dividend, causing early assignment for sellers. For index products like SPY, dividends are quarterly and the effect is modest.
The ex-dividend date is when the dividend’s value leaves the stock price — a predictable drop that options price in and that drives early-exercise decisions.
What it means for a scalper
For SPY 0DTE, ex-dividend dates are a minor, quarterly footnote — you’re trading intraday moves, not holding across dividends. It matters more for stock and longer-dated options traders. Know the term so a dividend-related price adjustment doesn’t look like a mysterious gap.