With more commodity exchange-traded notes listed each day, we asked HAI contributor Roger Nusbaum what he thinks abut the products.

• Should you worry about credit risk?
• Opening new markets
• Index tracking

Do you have more commodities exposure in your portfolio than you thought?

• Commodities + countries + alternative weighting = trouble
• The link between countries and commodities
• How much exposure do you need?

Uranium is hot, and Nusbaum tells you how to play it.

• The case for a uranium bull
• The big giants vs. the pure plays
• Adding a volatile asset

HAI's newest contributor says that buying stocks from commodity producing countries is not the same as buying the commodities themselves.