By Chuck Mikolajczak NEW YORK (Reuters) – A global gauge of stocks notched its biggest one-day percentage gain in nearly a month on Tuesday and the dollar weakened for a third straight day as expectations grew for the European Central Bank to enact a bigger rate hike than expected this week. A Reuters report that the ECB was weighing a 50-basis-point rate hike at its Thursday meeting, double the hike many market participants had priced in, helped put the euro on track for its biggest one-day percentage gain in nearly two months. Easing expectations that the U.S. Federal Reserve would resort to…