But what if you put in the contract, I might recklessly gamble your account to negative balances. Is it possible to put enough stuff where he could not have been sued?
No if you manage other people's money, you owe a duty of care to your clients to manage their money most prudently as possible and earn a decent return for their money. You have a first and foremost fiduciary duty to your clients. The disclaimers is just there to advise clients of some of the possible outcomes that may happen to their accounts; it is not an excuse or a green light for the money manager to be derelict in his/her duty. It's not like "oh well the clients have been told now that their money can go to the dogs so I can just do whatever to their money". No amount of disclaimers could ever absolve the people that you pay money to from their negligence, even though on every single entry ticket to the movie theatre, it's printed "Enter at your own risk". But if you slip and fall on some icy water that some brats spilled on the floor and get head injury that resulted in major brain damage because their staff failed to clean up properly or didn't clean the floors at all, you can still sue the theatre and most likely you will win. This is what I learned in my Corporate Law class.

