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 TETRA Technologies (TTI 0.45%) dropped 8% today after the company reported earnings.

So what: First-quarter revenue was up 2.1% from a year ago to $212.9 million, but was well below the $220.9 million consensus estimate. On the bottom line, adjusted loss was $4.1 million, or $0.04 per share, which was $0.09 short of the consensus.  

Now what: Weather delayed some U.S. operations in the first quarter, while project and testing delays in the U.S. and Mexico also affected earnings. A lot of these things are out of management's control, but they're concerning for investors. Management kept its guidance for 2014 flat, but continued delays would have a negative impact on shares over the next few quarters.