The announcement of a dividend typically leads to a temporary increase in the stock price as investors buy in to receive the dividend. However, on the ex-dividend date, the stock price usually drops by approximately the amount of the dividend, as the company's assets have effectively decreased by the amount of the dividend payout. In this case, BNY Mellon High Yield (DHF) has announced a dividend of 1.5 cents per share, which will likely cause the stock to open lower on the ex-dividend date.