It's been a long time since I've added a post to this thread and since gas is now down to $1.85 at Costco it seemed like a good time to add an update.
As before, it appears that gas prices are following a seasonal pattern and falling to the lowest price of the year in December/January.
It seems to me that it would be a
"no brainer" investment to buy 10,000 gallons of gasoline in January for $1.85/gallon and then sell it for $2.00+ during the Fourth of July weekend - that would be an annualized return of almost 20%.
Now if I could just figure out where to store 10,000 gallons of gasoline...