InterGlobe Aviation Ltd.'s stock price fell after India's civil aviation regulator asked its CEO to explain what caused the country's largest airline to experience major operational disruptions. The stock once fell 6.9% to 5,001 rupees in early trading in Mumbai, the biggest drop since April 7. IndiGo, operated by InterGlobe, cancelled more than 1,000 flights last Friday. The airline said in a statement on Sunday that it plans to operate more than 1,650 flights and that the punctuality rate of flights has increased to 75%.

InterGlobe Aviation Ltd.'s stock price fell after India's civil aviation regulator asked its CEO to explain what caused the country's largest airline to experience major operational disruptions. The stock once fell 6.9% to 5,001 rupees in early trading in Mumbai, the biggest drop since April 7. IndiGo, operated by InterGlobe, cancelled more than 1,000 flights last Friday. The airline said in a statement on Sunday that it plans to operate more than 1,650 flights and that the punctuality rate of flights has increased to 75%.