Wall Street frets as Volcker Rule nears vote

``Five years after the financial crisis, regulators will vote Tuesday on the "Volcker Rule,'' one of the most contested elements of the sweeping, post-crisis Wall Street reform act known as Dodd-Frank... The rule is also expected to give banks the burden of proving that any securities they do own are in their portfolios for the few remaining permitted purposes, rather than making regulators prove that the banks intend to break the rules, he said.''