What's better than momentum? Mo' momentum.

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

Company

Dec. 9 Weekly Gain My Watchlist
DemandTec (Nasdaq: DMAN) $13.12 65% Add
SuccessFactors (NYSE: SFSF) $39.87 52% Add
Martha Stewart (NYSE: MSO) $4.38 46% Add
Affymax (Nasdaq: AFFY) $7.64 46% Add
MGIC (NYSE: MTG) $3.78 24% Add

Source: Barron's.

Big Blue is still hungry. Shares of DemandTec were last week's biggest gainers, soaring after IBM (NYSE: IBM) agreed to buy the retail price optimization software provider for $13.20 a share in an all-cash deal.

SuccessFactors also found a willing buyer. Germany's SAP is acquiring the cloud computing darling. The deal for SuccessFactors is also an all-cash deal that will take out shareholders at $40 a pop.

"It's hard to bet against Stewart's company since it hired an investment firm to explore strategic alternatives a few months ago," I argued earlier this year, defending Martha Stewart Living Omnimedia. A buyout hasn't materialized, but something potentially even better happened last week. J.C. Penney (NYSE: JCP) took a minority stake in the company with plans to open a Martha Stewart "store within a store" concept throughout the department store chain come 2013.

Affymax was a hot investment after the Food and Drug Administration advisory panel voted nearly unanimously to recommend Affymax's promising anemia drug, peginesatide.

Finally, we have MGIC Investments bouncing back. The mortgage insurer revealed that homeowner delinquencies declined in November.

It was a great week for these five stocks. Now let's see if they're up for an encore.

Which of these five stocks do you think will continue to move higher? Share your thoughts in the comment box below.

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.