US markets - Dow fell -55-points or -0.20% The broader S&P500 drifted -0.16% lower, NASDAQ -0.22%. On the merger and acquisition (M&A) front, CNBC reported that discount broker Charles Schwab Corp (up +7.33) is in talks to acquire rival TD Ameritrade Holdings Corp ( +16.92%) , a deal that would create a company with US$5 trillion in combined assets.