Positive, company-specific developments have led to shares of TransMedics Group (TMDX 1.08%) and FuboTV (FUBO 2.17%) more than doubling this year, even as the S&P 500 is barely in the green since January. Investing wisdom advises us to buy low, and some might think that after a greater than 100% return in six months, it's too late to get in on these stocks. However, TransMedics Group and FuboTV still have excellent prospects that could lead to better-than-average returns over the long run. With results like ...