I doubt the X Date would be the day news is released or before, because it would effectively destroy any run up in the stock price, as the primary reason for a run up in the stock price, would be buying to get the dividend. You have to have purchased the shares anytime up until and including the day BEFORE the dividend date to be eligible for the dividend. If the X Date is the day news comes out or before, why would anyone buy the stock other than the future shell potential?
"In order for you to receive the upcoming dividend you must already own or you must purchase the stock prior to the ex-dividend date.
It is important to know when you buy or sell stock, there is a three-day settlement (three stock trading days) on all buy or sell orders."
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