The rules need to be changed so Banks can’t use Deposits to speculate.
The rules need to be changed so that only investors that have facilities to take delivery of the commodity can bid.
This is a seriously flawed approach. This would leave control of energy prices in the hands of a few huge companies and several less than trustworthy government entities. Not what I would call a good idea. Now requiring that they HOLD their purchases in energy for a minimum of 6 months? That would slow things down quite a bit. They would make sure they weren't paying more than it was truly worth for fear of getting stuck with it.