I have a few bucks and some time. I'm looking for a good brokerage house to *execute* some market trades. I have access to multiple retail brokerage accounts now. I have current accounts with CiTi, Chase, AMEX and BofA. They all want me to open a exchange account with them. I have traditional 401K and IRA investments. They money I am investing will not break me if I lose. What do the short trading fees look like at your brokerage?