We leave no stone unturned when looking for the next great investment idea. For example Europe is set to become the world's largest cannabis market, so we check out this European marijuana stock pitch. One of the most bullish analysts in America just put his money where his mouth is. He says, "I'm investing more today than I did back in early 2009." So we check out his pitch. We read hedge fund investor letters and listen to stock pitches at hedge fund conferences. We also rely on the best performing hedge funds ' buy/sell signals. We're going to check out the latest hedge fund action surrounding MTS Systems Corporation (NASDAQ: MTSC ).