Brokerage firm Citi assigned a 'Buy' rating to Vodafone Idea (Vi) shares and set a price target of ₹13, implying a 68% upside from Monday's closing levels. This comes after the government waived the requirement to furnish bank guarantees for past spectrum auctions. Before the relief, Vodafone Idea was supposed to submit bank guarantees worth nearly ₹24,800 crore.