In trading on Thursday, shares of Bank OZK's 4.625% A Non-Cumulative Perpetual Preferred Stock (OZKAP) were yielding above the 7% mark based on its quarterly dividend (annualized to $1.1562), with shares changing hands as low as $16.50 on the day. This compares to an average yield of 6.65% in the "Financial" preferred stock category, according to Preferred Stock Channel..