the company's constitution against the company and against other members. A share is an item of property, and can be sold or transferred. Shares also normally have a nominal or par value, which is the limit of the shareholder's liability to contribute to the debts of the company on an insolvent liquidation. Shares usually confer a number of rights on the holder. These will normally include: voting rights rights to dividends (or payments made by companies to their shareholders) declared by the company rights to any return of capital either upon redemption of the share, or upon the liquidation of the company in some countries, shareholders have preemption rights, whereby they have a preferential right to participate in future share issues by the company Companies may issue different types of shares, called "classes" of shares, offering different rights to the shareholders depending on the underlying regulatory rules pertaining to corporate structures, taxation, and capital market rules. A company might issue both ordinary shares and preference shares, with the two types having different voting and/or economic rights. It might provide that preference shareholders shall each receive a cumulative preferred dividend of a certain amount per annum, but the ordinary shareholders shall receive everything else. Corporations will structure capital raising in this way in order to appeal to different lenders in the market by providing different incentives for investment. The total value of issued shares in a company is said to represent its equity capital. Most jurisdictions regulate the minimum amount of capital which a company may have, although some jurisdictions prescribe minimum amounts of capital for companies engaging in certain types of business (e.g. banking, insurance etc.). Similarly, most jurisdictions regulate the maintenance of equity capital, and prevent companies returning funds to shareholders by way of distribution when this might leave the company financially exposed. Often this extends to prohibiting a company from providing financial assistance for the purchase of its own shares. Dissolution Events such as mergers, acquisitions, insolvency, or the commission of a crime affect the corporate form. In addition to the creation of the corporation, and its financing, these events serve as a transition phase into either dissolution, or some other material shift. Mergers and acquisitions A merger or acquisition can often mean the altering or extinguishing of the corporation. Corporate insolvency If unable to discharge its debts in a timely manner, a corporation may end up on