How Ex-Dividend Dates Affect Options

For most option holders an ex-dividend date changes almost nothing. The coming dividend is already priced into an option through the forward price of the stock, and the greeks pass through the ex-date without a jump. There is one sharp exception, and it runs the other way from what most people expect: the holder of an in-the-money American call sometimes should exercise it the day before the ex-date to capture the dividend. This post walks through both, using a real SPY option around its June 2026 ex-date.

Do stock options get adjusted for dividends?

Ordinary cash dividends do not change the terms of a listed option. The strike price stays put, the contract size stays put, and the option holder receives nothing from the dividend directly. That non-adjustment is exactly why the ex-date matters for calls at all: since the option is not made whole for the payout, a call holder who wants the dividend has to own the shares, which means exercising before the ex-date.

The exception is a special dividend. For a special or non-recurring cash distribution, the Options Clearing Corporation generally does adjust the contract, lowering the strike by the special amount on the ex-date. Ordinary dividends are on their own; special ones are handled by the clearinghouse.

Ex-dividend dates are priced in, so the greeks glide through

SPY pays a dividend roughly every quarter, near $1.90 a share of late.

SELECT
    toString(ex_dividend_date) AS ex_date,
    round(cash_amount, 3) AS dividend_usd
FROM global_markets.stocks_dividends
WHERE ticker = 'SPY'
  AND ex_dividend_date BETWEEN '2025-01-01' AND '2026-06-30'
ORDER BY ex_dividend_date

SPY went ex on a $1.904 dividend on 2026-06-18. The market can see a dividend coming weeks out, and it is already inside the option's price through the forward: an ordinary dividend makes calls slightly cheaper and puts slightly richer than a no-dividend world would set them. On the ex-date the stock opens lower by about the dividend, but a correctly priced option does not lurch, since that drop was expected all along. A liquid near-the-money SPY call and put show it directly.

SELECT date,
    round(anyIf(delta, position(ticker, 'C00740') > 0), 3) AS call_delta,
    round(anyIf(delta, position(ticker, 'P00740') > 0), 3) AS put_delta
FROM global_markets.options_greeks
WHERE ticker IN ('O:SPY260717C00740000', 'O:SPY260717P00740000')
  AND date BETWEEN '2026-06-11' AND '2026-06-24'
  AND implied_volatility > 0.02
GROUP BY date
ORDER BY date

The call's delta drifted from 0.535 to 0.494 over the two weeks as it tracked SPY, and the put's delta mirrored it (the two summed to about one in absolute value on every session: 0.535 against -0.467 at the start). Across the ex-date itself the call's delta sat at 0.634 the day before and 0.619 on the ex-date: essentially unchanged. There is no discontinuity on the ex-date, and none in the other greeks either. For the holder of a liquid option, the ex-dividend date passes without an event.

When is it worth exercising a call early?

Here is the one real decision the ex-date forces. An in-the-money American call carries two kinds of value: intrinsic value (how far in the money it is) and time value (everything else). Exercising early turns the option into stock, which lets you collect the upcoming dividend, at the cost of the time value you throw away by exercising. The rule follows straight from that trade: exercise an in-the-money call early for a dividend only when its remaining time value is less than the dividend.

A worked example makes it concrete. Say a stock trades at $50 and pays a $1.00 dividend tomorrow, and you hold a $40-strike call with two days left. Its intrinsic value is $10 and its remaining time value is $0.15. Exercising today captures the $1.00 dividend and gives up $0.15 of time value: a clear gain. Hold instead and you forgo the dividend. Flip the time value to $1.50 and the math reverses: keeping the option is worth more than the dividend, and you would not exercise.

Whether that threshold is actually crossed depends on the dividend's size, and SPY's is small. The panel takes the day before SPY's ex-date and measures the time value left in deep in-the-money calls (at least $25 of intrinsic value), grouped by how long they had to run.

SELECT
    multiIf(dte <= 9, '3 to 9 days', dte <= 16, '10 to 16 days', '17 to 45 days') AS days_to_expiry,
    count() AS contracts,
    round(median(time_value), 2) AS median_time_value,
    round(100.0 * countIf(time_value < 1.904) / count(), 0) AS pct_below_dividend
FROM (
    SELECT option_close - greatest(underlying_close - strike_price, 0) AS time_value,
           (expiration_date - toDate('2026-06-17')) AS dte
    FROM global_markets.options_greeks
    WHERE date = '2026-06-17'
      AND option_type = 'C'
      AND underlying_symbol = 'SPY'
      AND underlying_close - strike_price >= 25
      AND expiration_date > toDate('2026-06-17')
      AND expiration_date <= toDate('2026-08-01')
      AND implied_volatility > 0.02
)
GROUP BY days_to_expiry
ORDER BY min(dte)

Even one day before the ex-date, the median deep in-the-money call still held $3.89 of time value at 3 to 9 days out, rising to $5.92 at 17 to 45 days: all well above the $1.904 dividend. Only 14% of the near-dated group had less time value than the dividend. For a low-yield name like SPY, early exercise pays off only at the shortest expiries and deepest strikes. On a higher-yield stock the threshold is crossed far more often, which is why the writer of a covered call on a dividend payer watches the day before the ex-date closely: an in-the-money short call can be assigned early by a holder reaching for the dividend.

What about put options?

Puts sit on the comfortable side of the ex-date. The expected drop in the stock makes a put more valuable, and that value is already in the price before the ex-date arrives, so the put does not jump when the stock goes ex. There is no dividend-driven reason to exercise a put early either; early exercise of a put is a question about interest rates, not dividends. The dividend's whole options story is the call side.

FAQ

Do stock options get adjusted for dividends?

Ordinary cash dividends do not adjust listed option terms: the strike and contract size are unchanged, and holders receive nothing from the dividend. Special, non-recurring dividends are the exception, where the Options Clearing Corporation lowers the strike by the special amount.

Should I exercise my call before the ex-dividend date?

Only when the call is in the money and its remaining time value is less than the dividend. Exercising early captures the dividend but forfeits the time value, so the trade makes sense only when the dividend is the larger of the two. That is most common on higher-yield stocks and for short-dated, deep in-the-money calls.

Do call options lose value on the ex-dividend date?

Not as a jump. The expected drop in the stock is already in the call's price ahead of the ex-date, so a liquid call's delta and price pass through the date smoothly. Across SPY's June ex-date its near-the-money call delta held at 0.634 the day before and 0.619 on the date.

Do dividends make put options more expensive?

Yes. A coming dividend lowers the forward price of the stock, which lifts put values and trims call values versus a stock paying nothing. The effect is already priced in before the ex-date, not applied on it.

What is early assignment risk on a covered call?

If you have written an in-the-money call against stock you own, its holder may exercise the day before an ex-date to claim the dividend, assigning your shares away just before you would have collected it. The risk is largest when the call's time value has fallen below the dividend.

Every panel above is a stored, inspectable query. Open the SQL under any chart to audit it, or pull the greeks for any contract and any ex-dividend date on the Strasmore terminal.