Brokers are sneaky. There may be no explicit commisions, but they make their money from the bid/ask spread, and that can vary widely. Ask them what the spead is, and they *might* tell you. You can try shopping around, but it would entail transfering the assets in-kind to another brokerage and the price/yield could change while you wait.
Volumes are generally low on individual issues, but the market is efficient and prices are a function of current yield.
Favorite ERF quote: "I'm not going to waste my time on someone who's more interested in being stubborn or obtuse or intolerant." -- Nords
Favorite ERF error message: "Sorry Nords is a moderator/admin and you are not allowed to ignore him or her."