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 MasTech (NYSE: MTZ) jumped 10% for an instant this morning after the infrastructure construction company's board of directors agreed to a share buyback program. Shares settled to a more modest 6% gain later in the day.

So what: The board approved a buyback program that is up to $75 million in shares in the next 12 months. This expands on an existing $75 million buyback program for a total of $150 million in potential shares to be purchased by the company.

Now what: Considering the company's market cap is currently $1.3 billion, the total buyback authorization amounts to more than 10% of the company. That's an awful lot and is a very bullish sign that management thinks the shares are undervalued. I see the company's current 10 P/E ratio and the buybacks as enough for me to be bullish on the company's future.

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