There's a theory on Wall Street that a stock setting new high will continue to do so for a while -- and that stocks setting new 52-week lows will continue to plumb the depths. This kind of momentum is partially technical but also largely driven by big news including buyouts, big sales deals or other attention-grabbing headlines. To help you get on the right side of these momentum plays, here's a list of five big name stocks setting new 52-week highs lately. But please note than when it comes to 52-week highs there are sometimes as many reasons to be wary as there are reasons to think the profits will keep flowing. Some stocks surge after an acquisition and will soon stop trading. Others have big short interest, which means many are betting on a flop to occur soon. Keep in mind that these stocks here are not recommendations, just picks up against new highs as of this writing.