Some stocks dipped this week. Some corrected. But three health-care stocks, in particular, were downright crushed.

This week's biggest loser also ranked among the worst-performing stocks from a couple of weeks ago. Momentum works going up -- and going down. Another stock took a beating the old-fashioned way by reporting disappointing earnings results. Our third horrendous health-care stock could be still feeling the heat from attacks by a couple of firms suspected of being linked to short-sellers.

Which three stocks got crushed this week so badly? Find out by watching the following slideshow.