Just when you think a stock has had enough punishment, the sellers always seem to find a way to push it down more. At least, that's how Advance Auto Parts' (NYSE: AAP) downtrodden investors must have felt throughout this challenging year.

In hindsight, I should not have recommended Advance Auto Parts stock in June. Perhaps I felt that it had gone down so much that there was nowhere to go but up.

Yet, that's only true if a stock's price reaches zero. Thanks to the horrendous performance of Advance Auto Parts stock, I've learned a valuable lesson about value investing: Rooting for an underdog only makes sense if that dog doesn't keep biting you.

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Source Fool.com