Glossary: Rights issue
A way a company can raise capital by creating new shares and invite existing shareholders in the company to buy these additional shares in proportion to their existing holding to avoid a dilution of value, which means keeping a proportionate ownership in the expanded company, so that (for example) a 10% stake before the rights issue remains a 10% stake after it. As an added incentive, the new shares are usually offered below the market price of the existing shares, which are normally a tradeable security (a type of short-dated warrant) and this allows shareholders who do not wish to purchase new shares to sell the rights to someone who does.
A stockmarket security (a form of derivative) issued by companies on their own ordinary shares to raise capital. A warrant has a quoted price of its own that can be converted into a specific share at a predetermined price (called the conversion price) and future date. The value of the warrant is determined by the premium of the share price over the conversion price of the warrant. Warrants give the same economic exposure to an underlying security without actually owning it, and cost a fraction of the price of the underlying security.