Incidentally, you also can't buy futures on movie receipts or the price of onions. https://en.m.wikipedia.org/wiki/Onion_Futures_Act https://en.m.wikipedia.org/

Incidentally, you also can't buy futures on movie receipts or the price of onions. https://en.m.wikipedia.org/wiki/Onion_Futures_Act https://en.m.wikipedia.org/wiki/Onion_Futures_Act