May Day protests may be in full swing on Wall Street, but traders in the Financial District have their own rally to celebrate. The Dow hit its highest level since December 2007 on Tuesday with stocks rising 101 points on strong domestic manufacturing reports. The data far surpassed investor expectations for the month of April, easing anxiety about a stalled economic recovery. Standard & Poor’s tacked on 15 points with energy stocks leading the surge, and the Nasdaq jumped 34 points.