Another quick note,
There is a Daily Quest that tells you to engage in Futures 50 times.
Now, if you're anything like me, you'll not buy futures at a high price and you'll want to buy the most profitable commodity!
The trick is, buy 500 contracts of a cheap commodity, and sell them 1 contract at a time.
That way, you'll finish the quest as fast as possible, and be able to move on to the next Daily Quest, while not compromising your acquisition of cheap high yield contracts.