There's no question that Under Armour (UA) is a rapidly growing company, and that growth looks tantalizing for investors. However, a look at the stock's current and historical valuation shows UA might be in a bubble. At the very least, Under Armour will have to continue its rapid growth pace for the next several years for investors to realize any upside in the stock.

Health insurers Aetna (Aet) and Cigna (CI) are strong candidates for investment: Both boast annual revenue growth of 8% and Price/Earnings ratios of 19.6 and 17.6 respectively, among the best in the industry. Both fundamentals and technicals show that these stocks will likely only get more expensive in the future.

On Tuesday, Toyota (TM) shareholders approved a plan to replace up to 150 million shares of common stock with a new stock class, Model AA. There's clearly a lot of opportunity here, but also a lot of opportunity cost. Duncan Weinstein breaks it down in this article, a Seeking Alpha Editors' Pick.

Stock Rover user Allan Smith applies statistical analysis to the screening criteria used in our ‘March Midness’ tournament to see which criteria has the greatest effect on a stock’s price performance. See what he discovers in this guest post on our blog.