Dividend on 7/19, what to expect - might be a surprise
The dividend itself is one thing. Paying the dividend is an event that can trigger the stock price to move.
There's a new site that looks at historical data specifically around events like dividend pay dates. They take a look at the price movement depending on the number of days before and after the event.
Even when the ex-div date is past there can still be time to act. You won't get the dividend but in some cases you can make more on the price movement (up and down). It's time to check out ACE before the window is closed.