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

July 27

Weekly Loss

My Watchlist

ATP Oil & Gas (Nasdaq: ATPG)

$1.40

(48%)

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VirnetX Holding (NYSE: VHC)

$22.67

(36%)

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Zynga (Nasdaq: ZNGA)

$3.09

(36%)

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RadioShack (NYSE: RSH)

$2.59

(30%)

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Netflix (Nasdaq: NFLX)

$58.92

(28%)

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Source: Barron's.

ATP Oil & Gas shed nearly half of its value last week. A Bloomberg report detailing bondholders gearing up for bankruptcy clearly didn't sit well with investors in the offshore oil exporter.

VirnetX slipped after a setback in its efforts to enforce patents related to the security standards for 4G and LTE devices. The U.S. International Trade Commission found a "procedural discrepancy" in VirnetX's complaint.

Zynga fell after falling short in its latest quarter. A sequential dip in bookings was enough to give credence to the bearish argument that the social gaming giant may be peaking. Zynga's guidance did little to crush the naysayer thesis.

RadioShack added insult to injury by suspending its dividend after an ugly quarterly report.

Finally we have Netflix also serving up gloomy guidance for the balance of 2012. The leading video service may have topped 30 million global subscribers, but a weak outlook for net additions during the current quarter leaves was unsettling.

Ready for a bounce
It was a rough week for these five stocks. If you want to shake yesterday's losers and ride tomorrow's winners, a new special report reveals Motley Fool's top stock for 2012. It's free, but only for a limited time so check it out now.

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

The Motley Fool owns shares of Netflix and RadioShack. Motley Fool newsletter services have recommended buying shares of Netflix. 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.