https://www.flightglobal.com/air-china-doubles-h1-profits-on-fuel-hedging-gains/88629.article
Air China's profits after tax more than doubled in the first half of 2009, with fuel hedging gains helping to overcome large drops in passenger and cargo...
air chinafuel hedgingdoublesprofitsgains
https://www.businesstimes.com.sg/companies-markets/sia-warns-first-yearly-loss-due-covid-19-and-fuel-hedging-losses
SINGAPORE Airlines (SIA) expects to report a small operating profit, but a net loss, for the full year ending March 31, owing mainly to fuel hedging losses, it...
siawarnsfirstyearlyloss