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 Gentex (Nasdaq: GNTX) jumped 10% today after the company released record earnings.

So what: Fourth-quarter sales were up 25% to $222.1 million and net income jumped 23% to $36.9 million. The company's Rear Camera Display and SmartBeam mirrors drove sales and increased auto sales helped the supplier in 2010.

Now what: Gentex's innovative products are gaining traction in the automotive industry as customers demand more features. The stock is a little on the expensive side trading at 30 times 2011 estimates, but improving results may make Gentex worth the price. I am buying today's move and think demand for Gentex products will continue to drive better than expected results in 2011.

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