Many highly successful stock pickers, including Warren Buffett, often buy stocks on weakness. That’s largely because companies that are great or are on their way to greatness often sink for reasons that are not at all justified. For example, on Feb. 21, Super Micro Computer (NASDAQ:SMCI) dropped to as low as $817.08 per share. Many investors wrung their hands about the stock’s valuation, even though it was not expensive, along with the firm’s decision to sell more shares of its stock. Of course, the latter ...