to build on what tsquare said (and now i just noticed Bar's), but buying a fuel refinery is just a form of hedging. you can't hedge jet a, but you can hedge using heating oil futures. but those instruments weren't working anymore.

i believe that was because jet A's cost to refine oil to gas, crack spread, was out of whack in comparison to the cost of doing that with heating oil and the like.

so buying the refinery is a better idea to keep the hedging in line with the volatility of jet A. whether it makes it to our airplanes or not is not the goal i believe.

i'll go double check though. don't take my word for it.