You're spot on about commodity ETFs. They are required to buy at a certain time and sell at another time. Actually they're windows but they're well published.

You're spot on about commodity ETFs. They are required to buy at a certain time and sell at another time. Actually they're windows but they're well published. As you might be able to guess traders have had a field day with these funds. Most don't even closely track the commodity they're supposed to. Many have lost money while the commodity has gone up.