Summary: "When this bill becomes law, the joyride on Wall Street will come to a screeching halt," Harry Reid said last week, after the Senate passed its big finance reform bill. Today on Planet Money, we dig into the "Volcker Rule" -- the bill's ostensible ban on banks trading with their own money. And we look at the question: Will the joyride really come to a screeching halt? And would it be a good thing if it did?
