that's why the EMH is just a hypothesis, and not a truth or fact. And even in the theory, they don't claim perfect efficiency - just nearly perfect. Some people

that's why the EMH is just a hypothesis, and not a truth or fact. And even in the theory, they don't claim perfect efficiency - just nearly perfect. Some people obtain mispricings, take advantage of it, but in the process, push that efficiency up just a tid bit more.