Just think... just a little over two months ago, SPX was down almost 12% year-to-date with what appeared to be no end in sight. Since then, the market has been on an unabated rally that has erased all of those losses that the market was experiencing.

With that said, there are a lot of reasons to have reservations about buying or adding more long exposure to the portfolio, and if the day comes where the market does finally decide to turn lower again, the stocks listed below should be at the top of your list of trades to take.