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. We take a look at lists like the 10 most profitable companies in the world to identify the compounders that are likely to deliver double digit returns. We interview hedge fund managers and ask them about their best ideas. If you want to find out the best healthcare stock to buy right now, you can watch our latest hedge fund manager interview here. We read hedge fund investor letters and listen to stock pitches at hedge fund conferences. Our best call in 2020 was shorting the market when the S&P 500 was trading at 3150 after realizing the coronavirus pandemic's significance before most investors. Now we're going to take a peek at the latest hedge fund action regarding K12 Inc. (NYSE: LRN ).