Readers hoping to buy Tosoh Corporation ( TSE:4042 ) for its dividend will need to make their move shortly, as the stock is about to trade ex-dividend. The ex-dividend date generally occurs two days before the record date, which is the day on which shareholders need to be on the company's books in order to receive a dividend. The ex-dividend date is an important date to be aware of as any purchase of the stock made on or after this date might mean a late settlement that doesn't show on the record date. This means that investors who purchase Tosoh's shares on or after the 28th of March will not receive the dividend, which will be paid on the 2nd of June.