Shares of InterGlobe Aviation Ltd., the operator of IndiGo, fell sharply after the airline reported a decline in profit for the third quarter, underscoring mounting pressure from higher operating costs and softer yields. The earnings outcome disappointed investors who had priced in sustained profitability amid strong passenger demand. Rising fuel expenses, currency-related costs, and competitive pricing weighed on margins, offsetting growth in traffic volumes. The market reaction highlights growing sensitivity to cost discipline and pricing power in the aviation sector.