Part of your opinion should include a price target. Let's assume your hypothesis is right -- when the rest of the Street discovers the stock, where can it go? I prefer to use two targets: a reasonable price and a best-case scenario. That way, I can revisit my thesis later and see if a stock that's working is worth sticking with. The investment thesis should also consider upcoming catalysts, which you should track to both confirm your upbeat view, and to see how the stock reacts.