The waning competitive intensity due to the departure of Jet Airways br br has led to significant improvement in yield within the industry, thus helping br br the incumbents post strong earnings in Q4 FY19. br br Further, the decline in fuel cost in the quarter gone by has helped companies further expand their margin. br br br br Sakshi Batra does a 3 point analysis of Q4 results of the biggest Indian airline, InterGlobe Aviation, the parent company of IndiGo.