Nothing is going wrong, but one of its peers just hit a serious snag.If you can do the mental work to separate your sentiment about a stock from its recent price action, buying the dip in a recently dented winner can be a profitable investing strategy. Of course, it's key that you determine whether a business is experiencing a temporary setback or a more durable downturn before making the decision to buy. That can make the difference between buying the dip and making more money later, and buying the dip onl ...