Vodafone Idea's Rs 25,000 crore rights issue opens. Is it worth your money?

Vodafone Idea’s Rs 25,000 crore rights issue opened on Wednesday. The country's largest telecom firm is offering 2,000 crore shares at a price of Rs 12.50 apiece. The entitlement ratio of the issue, which will close on April 24, has been fixed at 87 rights shares for every 38 currently held by shareholders. On Tuesday, the stock settled at Rs 16.90 apiece on BSE. 

By definition, a rights issue is an invitation to the existing shareholders of the company to buy additional shares at a discounted price in proportion to their holding of old shares. In this offering, the companies grant