If you sell your stock before the ex-dividend date, you also are selling away your right to the stock dividend. Your sale includes an obligation to deliver any shares acquired as a result of the dividend to the buyer of your shares, since the seller will receive an I.O.U. or "due bill" from his or her broker for the additional shares. Thus, it is important to remember that the day you can sell your shares without being obligated to deliver the additional shares is not the first business day after the record date, but usually is the first business day after the stock dividend is paid.
If you have questions about specific dividends, you should consult with your financial advisor. You can also get information by going to your library and reading Standard and Poor's Dividend Record Binder.
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