자료: http://www.answers.com/topic/rights-offering-issue

Investment Dictionary: 

Rights Offering (Issue)

Issuing rights to a company's existing shareholders to buy a proportional number of additional securities at a given price (usually at a discount) within a fixed period.

Investopedia Says:
Rights are often transferable, allowing the holder to sell them on the open market.

Related Links: 
Not sure what to do if a company invites you to buy more shares at discount? Here are some of your options.Understanding Rights Issues

※ 메모: 위 정의를 보면, 신주 발행이나 신주인수권(warrant)이 아니라, 유상증자를 뜻한다.

Cf. Investment Dictionary: Warrant

A derivative security that gives the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue as a "sweetener" to entice investors.

Investopedia Says:
The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months.

Related Links: 
Discover the advantages of this high-return investment tool that's largely unexploited by investors. What Are Warrants?