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: Do you love roller coasters? Then you're going to love Fifth Street Finance (NYSE: FSC). This business development company dropped 16% in early trading this morning, perhaps prompted by doubtful words from the Oracle of Not-Omaha, Jim Cramer.

So what: Last night on Mad Money, Cramer worried aloud over Fifth Street's ability to finance its monster 11% dividend yield. This morning, the worry turned contagious. Granted, after the plunge investors came to their senses and began buying the stock again, reducing Fifth Street's loss to just 2% at last count -- but not before a whole lot of damage was done to investor portfolios.

Now what: Was the damage deserved? I'm not so sure it was. If it's the company's dividend payout ratio of 188% that worries Cramer, well, Fifth Street could easily cut that payout in half, and still pay out a 5.7% divvy. Tack that onto the company's 7.6% growth rate and P/E of 15.6, and you're pretty close to a fair price on this stock.

Long story short, I'm not personally going to run out and buy Fifth Street at today's prices. But I'm not convinced it's a great short idea either.

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