Worried about future price increases, buy in advance, and avoid the cost of price increases if they are used.

2, negative, although there is a hedging mechanism, but it is only a hedging tool, which is full of risks in itself. Airlines such as Air China have suffered huge losses, so of course they hope that the futures oil price will be low and try not to participate in the crude oil futures market. Just look at the trend of aviation stocks in 2008.