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 Uni-Pixel (UNXL) have popped today by as much as 13% after an insider purchase was disclosed.

So what: CEO Reed Killion picked up an additional 3,400 shares this morning at a price of $14.90, bringing his total direct holdings to over 102,000 shares. That amounts to an additional investment of approximately $51,000 as Killion expresses confidence in Uni-Pixel's prospects.

Now what: The company has been working with Eastman Kodak to commercialize its UniBoss sensor film. Investor optimism propelled shares as high as $41.42 in April, only to see a brutal 26% sell-off on rumors that Apple could become a direct competitor after a patent application was discovered. Analysts have defended the Uni-Pixel, and Killion's personal purchase shows that the CEO isn't too worried, either.

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