Random schmuck here. There's tons of supervision, communication with research and clients, oversight, and risk limitation. Also, you can't make big bets without

Random schmuck here. There's tons of supervision, communication with research and clients, oversight, and risk limitation. Also, you can't make big bets without occasionally losing, and people usually know exactly whom to blame. (Sometimes it's not the trader whose position blew up, but the desk manager or senior sales person who fought for the trade, or even a client who had inside info on a deal.) The only truly stupid bets are the illegal and/or unauthorized ones.