The term 'KIND OF STOCK: ABBR.' can be solved by the following crossword solutions: PREF (4 letters), OTC (3 letters), and PFD (3 letters). PREF stands for preferred stock, which is a type of security that has a higher claim on assets and earnings than common stock. OTC stands for over-the-counter stock, which is a type of security that is not listed on a major exchange. PFD stands for preferred dividend, which is a dividend paid to preferred shareholders before any dividends are paid to common shareholders.