The early-exercise census: every ITM call on every June 30 ex-dividend payer, tested on June 29

Answered against 22 years of US equities and 12 years of US options data and published with the query that produced it. This result is stored as of 2026-07-17, from How Ex-Dividend Dates Affect Options.

Rows × columns

1 × 4

Computed

2026-07-17

Completeness

No missing values

Source

US exchange, SIP and OPRA market data

Licence

Strasmore terms · free, no signup

Formats

JSON · CSV · the SQL below

What each column holds

Computed from Strasmore's warehouse of US exchange, SIP and OPRA market data. Equity prices are delayed; options greeks and implied volatility are end-of-day. This result is stored, not recomputed on load — it is exactly the numbers that were returned on 2026-07-17, and the query below is what returned them.

WITH divs AS (
    SELECT ticker, max(cash_amount) AS dividend
    FROM global_markets.stocks_dividends
    WHERE ex_dividend_date = toDate('2026-06-30') AND cash_amount > 0
    GROUP BY ticker
)
SELECT count(DISTINCT g.underlying_symbol) AS underlyings_measured,
       count() AS itm_calls_measured,
       countIf(g.option_close - (g.underlying_close - g.strike_price) < d.dividend) AS exercise_optimal,
       round(100.0 * countIf(g.option_close - (g.underlying_close - g.strike_price) < d.dividend) / count(), 1) AS pct_optimal
FROM global_markets.options_greeks g
INNER JOIN divs d ON g.underlying_symbol = d.ticker
WHERE g.date = toDate('2026-06-29')
  AND g.option_type = 'C'
  AND g.underlying_close - g.strike_price > 0
  AND g.expiration_date > toDate('2026-06-30')
  AND g.implied_volatility > 0.02 AND g.iv_converged