Western Alliance Bancorporation ( NYSE:WAL ) stock is about to trade ex-dividend in 4 days. Typically, the ex-dividend date is one business day before the record date which is the date on which a company determines the shareholders eligible to receive a dividend. The ex-dividend date is important as the process of settlement involves two full business days. So if you miss that date, you would not show up on the company's books on the record date. Accordingly, Western Alliance Bancorporation investors that purchase the stock on or after the 16th of November will not receive the dividend, which will be paid on the 1st of December.