Speculation is not really any business transaction. My late father used to define 'speculator' as ' a man who buys something that does not yet exist, which he doesn't want, with money he hasn't got, which he never sees, to sell to someone who may or may not want it (same as him), for someone who does want to use it in the future to buy'' Not all those elements exist in every case, but it describes many speculators, and it certainly identifies elements which make some speculation bad for us all. He explained further that a speculator can make money whichever way the prices go, up or down That's the key to its benefits. Oddly, the parties cause a balance in the market., in the course of everyday trading. The commodity markets depend on it. It enables big users to know what price they'll pay in future for their cocoa beans or their copper and they'll try to time their orders so that the best price for a given time is obtained. The daft results for oil have been the result of speculators, as above, going mad and dealing with yet more speculators who catch, and may talk up, the mood.It's very doubtful whether, in fact, much of the commodity is actually bought by users at those very high prices. You'd need to be desperately short of it, at that moment. The people who get hurt are the last speculators in the line because they've been landed with something which nobody wants at the price paid by the speculator,