There's never a shortage of losers in the stock market.

Let's take a closer look at five of this past week's biggest sinkers.

Company

May 11 Weekly Loss My Watchlist
MAKO Surgical (Nasdaq: MAKO) $23.20 (42%) Add
Fossil (Nasdaq: FOSL) $78.55 (39%) Add
Jaguar Mining (NYSE: JAG) $1.53 (34%) Add
MEMC Electronic Materials (NYSE: WFR) $2.26 (33%) Add
Dendreon (Nasdaq: DNDN) $9.06 (20%) Add

Source: Barron's.

MAKO was a big loser last week, tumbling after posting disappointing quarterly results: The company sold just six of its Rio systems that provide robotic precision to some orthopedic procedures.

Fossil definitely felt like a fossil after the trendy watchmaker posted problematic quarterly results. Weakness in Germany and South Korea stung, but the company is also lowering its near-term profit outlook.

Jaguar Mining may be a cat that's running out of lives. The miner failed to impress investors with its turnaround plan.

Several analysts downgraded MEMC after weak demand for its solar products results in a larger than forecasted quarterly deficit.

Finally, Dendreon slipped after telling investors that sales of its prostate cancer treatment Provenge aren't so hot. Is anyone surprised? Provenge is pretty darn expensive, regardless of the company's stance that it simply needs to do a better job in the education process. An uninspiring outlook isn't helping, either.

Ready for a bounce
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The Motley Fool owns shares of MAKO Surgical, Fossil, and Dendreon. Motley Fool newsletter services have recommended buying shares of Fossil and MAKO Surgical. Motley Fool newsletter services have recommended shorting Fossil. The Motley Fool has a disclosure policy. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. Try any of our Foolish newsletter services free for 30 days.

Longtime Fool contributor Rick Munarriz calls them as he sees them. He does not own shares in any of the stocks in this story. Rick is also part of the Rule Breakers newsletter research team, seeking out tomorrow's ultimate growth stocks a day early.