Ready yourselves, Fools -- I'm about to reveal three companies that are likely to make huge moves this week. But here's the thing: I don't think you should buy, sell, short, or otherwise try to profit from these moves.

Sound odd? Let me explain.

Rarely can investors predict with any hint of accuracy when stocks will make huge moves. There is, however, a set of circumstances where such moves are highly likely. Specifically, when a company that's heavily shorted reports earnings, volatility is usually right around the corner.

This week, 3D Systems (NYSE:DDD)InvenSense (NYSE:INVN), and Vector Group (NYSE:VGR) will find themselves in that situation.

It's never a Foolish idea to simply trade in stocks -- instead of investing in ownership through stocks -- especially in the short term. That's especially true with these three stocks, as there's no way to tell whether these huge moves will be up or down. But for those who already own them, read below to see what you should keep your eyes on.

Brian Stoffel owns shares of 3D Systems. The Motley Fool recommends 3D Systems and InvenSense. The Motley Fool owns shares of 3D Systems and InvenSense. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.