Morgan Stanley to Lose Highly Secretive, and Colorful, Trader

``Muller, who has had no outside investors to please, has kept the strategies and performance of PDT under wraps, stoking the curiosity and envy of rivals... After almost two decades at Morgan Stanley, Muller is about to go out on his own, a move precipitated by the biggest regulatory overhaul of Wall Street since the Great Depression. Banks are jettisoning or closing groups like PDT as a result of the Dodd-Frank Wall Street Reform and Consumer Protection Act, which President Barack Obama signed into law in July 2010. ''