I fully recognize that markets often overshoot. The first week in March was an excellent example of an overshoot to the downside. It seems, too, that the last week in April might be another example of an overshoot -- but to the upside. Buy low and sell high. Doug Kass is the author of The Edge, a blog on RealMoney Silver that features real-time shorting opportunities on the market.Know What You Own: In midday trading on Thursday, the most active stocks included the SPDR International Dividend (DWX), Bank of America (BAC), Citigroup (C), the Financial Bear 3X (FAZ), the Financial Bull 3X (FAS), S&P Depositary Receipts (SPY), and the Financial Select SPDR (XLF). For more on the value of knowing what you own, visit TheStreet.com's Investing A-to-Z section.