5 of Last Week's Biggest Winners

What's better than momentum? Mo' momentum. Let's take a closer look at five of this past week's biggest scorchers.

Source: Barron's.

Let's start with Ariad. The profitless biotech soared after a report in London's Daily Mail positioned Ariad as buyout bait. The report claims that Ariad's board was approached with an offer to buy out the promising drug maker for $20 a share. Even after last week's run, Ariad is still trading in the single digits.

RadioShack showed signs of life after Jamie Zimmerman's LiteSpeed Management reportedly snapped up an 8.1% stake in the struggling consumer-electronics chain. The small-box retailer is certainly out of favor. It's been trading in the single digits for more than two years. However, having the well-regarded hedge fund take a material stake in RadioShack will turn heads.

Netflix streamed a winner on the week after impressing the market with fresh financials. The leading premium video service closed out the year with more than 44 million streaming subscribers worldwide, and it expects to have more than 48 million online customers on its rolls by the end of this quarter. 

Fusion-io moved higher after posting better-than-expected financial results. An adjusted deficit of $0.06 a share on $94.5 million in revenue may not seem like much, but it's well ahead of its earlier guidance and the $0.10-per-share loss on $89.4 million in revenue that Wall Street was targeting. 

Finally, we have Vonage moving higher after an analyst initiated coverage with a bullish buy rating. Craig-Hallum is setting a price target of $7 on the provider of Web-based telephone service. Even after last week's pop on the upgrade, the analyst's price target implies another 62% of upside this year.