5 of Last Week's Biggest Losers

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.

Source: Barron's.

Multi-Fineline Electronix fell after offering up weak bottom-line guidance. M-Flex is targeting $290 million for its fiscal first quarter. That's ahead of its earlier forecast, but the stock took a hit as profitability is coming under fire in light of shrinking gross margins.

Leap Wireless disconnected with investors after Jefferies & Co. downgraded its rating on the stock to hold, slashing its price target from $6 to $5. The Jefferies analyst is concerned about competition in the prepaid wireless market, also warning that its spectrum to a potential acquirer isn't as valuable as optimists may think.

Power-One lost some power after the inverter maker offered lackluster guidance. Power-One is now expecting fourth-quarter revenue of no more than $195 million, well short of the $221 million analysts were targeting. Power-One is also now eyeing a loss. Wall Street was holding out for a small profit.

DragonWave wasn't exactly breathing fire last week. The supplier of packet microwave radio systems for mobile and access networks continues to slide after posting disappointing quarterly results earlier this month. Revenue fell short of expectations, and DragonWave has now posted a larger deficit than analysts have been expecting in three of the past four quarters.

Coldwater Creek ran cold after announcing preliminary results for the holiday quarter that were ho-ho-horrible. The apparel retailer is now warning of a wider loss than it was originally forecasting on flat same-store sales.