Quote from teun:
Yes, because USO uses spot (front month) contracts, not forward. But as they have to roll over the futures, in a contango market this is expected to cost money, which should be reflected (negatively) in the (future) share price.
To say it in other words: when the price of spot oil will rise as the current forward curve indicates, the price of USO will stay the same as it is now because the cost of rolling over is exactly the same as the (opposite) effect of the increased spot price.
Makes sense; I guess there has to be some reason you can't just buy the ETF, short a far back month of crude, and watch the $$$ roll in.
Teun - do you know if the expected effect of the contango on the future price of USO is generally agreed upon to a fairly precise extent? Or, since ETFs are still relatively young, is there still a fair amount of uncertainty as to the exact effect?
