I’ve flagged the debt-limit negotiations as an obvious arbitrage opportunity for savvy investors who understand Washington Kabuki. Did that seem paranoid? Well, now comes Democratic Rep. Betty McCollum of Minnesota with a resolution barring members of Congress from trying to profit off this particular dance. But the rest of us can still try to exploit the inevitable market mini-panic that will be followed by the inevitable restoration of calm. And honestly, I doubt that McCollum’s 72-hour rule would prevent savvy congressmen from exploiting the written-in-advance nature of this story either.