Callable stock is shares in a company that the company can buy back under the terms of an agreement that states the buy back price (known as the call price) and the dates or circumstances under which it can buy back the shares. The term "callable stock" is almost always applied to preferred stock.
Preferred stock usually involves the payment of a predetermined amount of interest to the holders of the stock, such as 8% interest, to be paid at the end of each year. A company may not want to pay this interest in perpetuity, especially if the interest rate paid is substantially above the market rate. Therefore, it includes the callable stock feature in the stock agreement so that it can buy the stock back, thereby eliminating its obligation to continue paying the high interest rate. A typical call feature states that a company can buy back preferred stock at a specific price point, plus any accrued interest that the stockholder has earned since the last interest payment date.
For example, ABC International issues preferred stock at $100 per share, with 8% interest. The stock agreement contains a call feature, under which ABC has the right, but not the obligation, to buy back the shares at any time after two years have passed, at a price of $120 plus any interest that has been accrued but not paid as of the buy back date.
A side effect of this example is that the market will not bid the price of the stock over $120, since a buyer could potentially lose the difference between $120 and any higher price paid to buy the stock if the company elects to trigger the buy back clause. Because of this built-in limitation on the price of preferred stock, investors tend to resist the call feature.
A variation on the callable stock concept is the right of first refusal, under which a company has the right to meet any offer made to purchase the shares of a shareholder. By doing so, the business can reduce the number of shareholders, which concentrates voting rights with a smaller number of shareholders, and also reduces the risk that having an excessive number of shareholders will force the company to begin filing reports with the Securities and Exchange Commission as a public company.
Callable stock is also known as redeemable stock.