Shares of Interglobe Aviation which operates airline Indigo jumped 4.4% on Tuesday to hit a fresh 52-week high of Rs 3,429.90 on the NSE after a couple of top brokerages took favourable views on the counter. While Jefferies upgraded its rating to ‘Hold’ from ‘Underperform’, Kotak Institutional Equities reiterated a buy and raised the price target.