Trading on the Nasdaq was halted on Thursday for more than 3 hours, and the only formal explanation that we got was that it was a "technical issue".  On Tuesday, Goldman Sachs made thousands of "erroneous trades" that are now being canceled.  If those trades had not been canceled, it could have cost Goldman "hundreds of millions of dollars" according to the Wall Street Journal.  How nice for them that they get a "do over".  When Knight Capital made a similar "trading error", they were not so fortunate.  Our financial system has become completely and totally dependent on computers, and that means that it is extremely vulnerable.  After what we have witnessed this week, how can they actually expect us to have faith in these financial markets?