"Buying because the stock price has gone down without knowing some of the underlying issues or without understanding some of the underlying activities, could be problematic," says Clark Bellin, president and chief investment officer at Bellwether Wealth. After all, a stock could take major losses and then soar to new heights à la Apple. But what about that same markdown in the price of that company's stock? You'll just have to figure some things out before you buy, says Sam Stovall, chief investment strategist at CFRA. Rather than scrambling to do research, he says, keep a watchlist of stocks you'd be interested in buying at the right price.

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Persons: Clark Bellin, Sam Stovall, Bellin, Charles Rotblut, Stovall, It's, Raife Giovinazzo, Giovinazzo Organizations: Blockbuster, Nike, American Association of, Fuller, Thaler Asset Management, Nasdaq, Yahoo Finance, CNBC