Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of Yingli Green Energy (NYSE: YGE) jumped as much as 10% today after the company released earnings.

So what: Revenue jumped 36% to $667.7 million, but gross margins fell to 10.8% from 22.1% in the second quarter as low sales prices weighed on earnings. But on an adjusted basis, earnings per share surprised analysts, reaching $0.14 per share, exceeding the $0.02 loss they had expected.

Now what: There is still a lot of uncertainty for Chinese solar manufacturers considering the vast oversupply in the industry and a European debt crisis hanging over the biggest market. But Yingli is one of the strongest Chinese manufacturers and could emerge a winner when an industry shakeout is complete. That said, I'm not rushing out to buy shares today and would stick with U.S.-based SunPower (Nasdaq: SPWR), which has higher efficiency panels, similar margins, and a large project backlog to smooth over rough patches in earnings.

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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.