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 networking gear maker F5 Networks (Nasdaq: FFIV) climbed 11% on Thursday after the company's quarterly results topped Wall Street expectations.

So what: Demand in the second-quarter was so strong -- revenue soared 22% to $339.6 million versus the consensus of $335.3 million -- that analysts like Deutsche Bank and Wunderlich have no choice but to raise their price targets on the stock. F5 even nabbed more enterprise market share from gorilla rival Cisco Systems (Nasdaq: CSCO), suggesting that the company has plenty of momentum working in its favor.

Now what: Looking ahead, management expects third-quarter revenues of $350 million to $355 million, which was pretty much in line with estimates. "All of our security products gained momentum in Q2," CEO John McAdam said on a conference call. "The data center firewall solutions are coming on very strongly." With the stock now up roughly 100% from its August lows and trading at a P/E of more than 40, however, the easy money might have already been made.

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