Yeah, that's a nice fairy tale. It isn't true though. It's criminally untrue.
I can't eat volatile grain, nor hedged grain. I just eat grain. At a price I can afford, today and tomorrow, not bankrupting me in the process. When you're hungry you really don't care about all the financial jargon. You care about price.
Traders cannot make a profit if they don't manipulate the price. Simple, if a trader always sold for the same price he bought for he wouldn't make any money. So price goes up, trader has profited from the grain I eat, and has taken a few cents out of my pocket. And I don't even trade. I just live on a dollar day in a shithole somewhere.
If everybody bought just the grain they needed to eat, and every grain producer simply put their product on the market for people to buy, without a "liquid global market" and price index, without traders in the middle wanting to profit from it, my food would be affordable. But because the market bets on a price rise in the future, even though the bad weather hasn't materialized yet, my food is unaffordable.
In financial, when someone profits, someone hurts. And the one that hurts is almost always not even in the game.
> Significantly influencing the price of a commodity [...] is pretty much impossible unless you're acting on behalf of a country or are able to control weather.
No. A market can do that by itself. It's what all those terms bullish and bearish and stuff are for. Markets can drive up commodity prices like a rocket. Bad weather coming? "Let's buy all the grain everybody! Guaranteed profit! Just ignore the starving people over there, they'll go away fast enough." And buy the way, all those think tanks and the pentagon predicting a shortage of every natural resource in the near future, that's not going to influence the price at all, right? Great example of how a country manipulates commodity prices btw.
Financial trade is just people profiting from people who are worse off to begin with. And don't start about how nowadays regulations are much tighter and all that, it's just not true. Everybody always says that in times when stuff is stable, but as soon as something big happens everybody starts the "nobody could have forseen this" dance followed by the too-big-to-fail entities being saved by the govt and the bill footed to the people.