While Jet Airways closed nine per cent higher at Rs 419, the SpiceJet stock closed at Rs 18.05, up five per cent. In its forecast last month, the International Air Transport Association (IATA) had said in 2015, global airlines would post a collective profit of $25 billion on the back of falling crude oil prices and economic growth. It has revised its profit outlook for 2014 from $18 billion to $19.9 billion. "The industry outlook is improving. The global economy continues to recover and the fall in oil prices should strengthen the upturn next year," IATA Director General Tony Tyler said in a statement. Credit rating firm CRISIL expects Indian carriers to post an operating profit of Rs 8,100 crore in 2015-16. However, Air India, Jet Airways and SpiceJet aren't expected to report net profits, as they are in need of fund infusion.