Time of purchase based on ex-dividend date. Great increase in value of companies which have plowed back earnings into growth as opposed to dividends or distributions. Prospect of higher interest rates which put high dividend payors such as REITs, limited partnerships, and utilities out of favor. Do not worry about the short term stock price. Worry about an adequate revenue to maintain the high yield.
Bought it at a current yield that was too low. Range this year has been about 5.7% to 6.7%. If this is a taxable investment consider taking your loss and moving into KMR instead. My buy yield for KMR is 7% and it is there plus some.