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 tire maker Cooper Tire & Rubber (NYSE: CTB) rose 14% today after the company released earnings that topped expectations.

So what: Fourth-quarter sales rose to $1.05 billion, driven by 16% growth in North American tire sales. Analysts had expected $1.02 billion in sales. Adjusted earnings per share was $0.51, easily topping estimates of $0.39 per share from analysts.

Now what: According to management the ultra-high performance, light truck, and SUV markets drove stronger results in North America. Internationally, higher prices helped make up for lower demand. I'm a little worried about the lower volumes, but the company's forward P/E ratio of 10, and 2.7% dividend yield, is still attractive right now.

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