优先股股票

优先股股票定义：
国外一般把股票分为：优先股和普通股（中国大陆只有普通股，没有优先股的概念）。
preference shares
Definition
Capital stock which provides a specific dividend that is paid before any dividends are paid to common stock holders, and which takes precedence over common stock in the event of a liquidation. Like common stock, preference shares represent partial ownership in a company, although preferred stock shareholders do not enjoy any of the voting rights of common stockholders. Also unlike common stock, preference shares pay a fixed dividend that does not fluctuate, although the company does not have to pay this dividend if it lacks the financial ability to do so. The main benefit to owning preference shares are that the investor has a greater claim on the company's assets than common stockholders. Preferred shareholders always receive their dividends first and, in the event the company goes bankrupt, preferred shareholders are paid off before common stockholders. In general, there are four different types of preferred stock: cumulative preferred stock, non-cumulative preferred stock, participating preferred stock, and convertible preferred stock. also called preferred stock.

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Refer：
http://wiki.mbalib.com/wiki/%E4%BC%98%E5%85%88%E8%82%A1