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.

Isis was a goddess for investors. Buzz is building ahead of the FDA's decision on the biotech's promising treatment for familial hypercholesterolemia. Regulators are expected to make their call on Kynamro later this month. If it's approved, investors are betting on either a spike in business or a buyout at a healthy premium.

SUPERVALU makes a repeat appearance on this list. Shares of the supermarket operator soared 23% a week earlier after receiving interest from private-equity giant Cerebrus for some of its assets. The rally continued as Cerebrus firmed up its plans to buy the Albertsons chain from SUPERVALU while taking a stake in the rest of its assets.

SUPERVALU has a long way to go to reclaim the losses it suffered in 2012. The company lost more than two-thirds of its value after nixing its dividend and closing down stores. However, it has become one of 2013's hottest stocks.

Isis wasn't the only stock moving higher on the hype of an announcement expected later this month. BlackBerry picker Research In Motion climbed ahead of the Jan. 30 introduction of its updated BlackBerry 10 mobile operating system. RIM's popularity has been waning in a world of iOS and Android devices, but this is the Canadian company's best shot at regaining its former relevance.

Nokia is another laggard in 2012 that has stormed back this month. The phone maker soared after revealing that it sold 6.6 million smartphones during the holiday quarter, including 4.4 million of its popular Lumia phones powered by Windows Phone.

Marvell inched higher every single day this past week, closing out the trading week with a 10% gain. The company announced several new products and partnerships during the Consumer Electronics Show, centering primarily on smart TVs.