Ex-dividend date
ex-date
On the ex-date the dividend is deducted from the price, so the stock opens lower by about that amount. Calls lose, puts gain; just before it, a call can be exercised early.
In the screenerShown in the “Dates” block so you have it in view when choosing an expiry.
See it in the screener
The live demo shows every term with example data, right next to the score and its reasons.