Act Up NY Activist Mark Milano holds a cat litter box with a photo of Martin Shkreli at the bottom of it. The activists were protesting the enormous price increase of Daraprim in front of the Turing Pharmaceuticals Offices in Midtown, New York City. Erik McGregor/Demotix/Corbis Advertisement What has Martin Shkreli done to earn so much disdain that news of his arrest has inspired people to celebrate with glee? The list is a long one, and it sounds like something out of a cartoonish villain's dossier. First, he made a fortune on the stock market short selling stocks. Short selling is a strategy that banks on a company's performance taking a nosedive. So let's say you suspect a particular company is going to hit some rough financial trouble. You sell off stock in that company. The only catch is you don't actually own any of that stock; you're selling something you don't possess. Short selling is totally legal. You actually do deliver stock to a buyer. And later on, you buy the stock … [Read more...] about The Most Hated Man in America Gets Arrested