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 Tibco Software (Nasdaq: TIBX) jumped 10% briefly after rumors of buyout talks arose.

So what: Hewlett-Packard (NYSE: HPQ) looked into buying the company, but talks fizzled two weeks ago. Goldman Sachs was advising Tibco on the possible buyout.

Now what: The stock spiked at the open, but since traders already knew a deal wasn't imminent, we've since seen shares pull back. I wouldn't read into this rumor too much, because it looks like HP has given up, and the market isn't expecting a deal anymore. The 4% bump that shares still retain makes this a nice point for anyone looking to sell, but I'm not seeing any buy signs today.

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