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 BlackRock Kelso Capital (Nasdaq: BKCC) slumped for the second consecutive day, down as much as 12% in intraday trading. The stock is still off close to 8% as I write this.

So what: Investors' ongoing dumping of BlackRock Kelso likely has to do with its massive earnings miss. But a sell-off in Nasdaq-listed stocks could also be taking a toll. Mr. Market has spent days shivering at the thought of $100 oil.

Now what: Don't take that to mean you should get complacent. My Foolish colleague Sean Williams was right to compare BlackRock's big price tag to its relatively cheap peer, MVC Capital (NYSE: MVC).

That's not the only difference between these two. Over the past year, BlackRock Kelso has seen returns on assets decline by 90 basis points and return on equity drop by 120 basis points. MVC's returns on assets and equity, while lower, have remained mostly steady over the same period. BlackRock Kelso is headed the wrong way, and in more ways than one.

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Fool contributor Tim Beyers is a member of the Motley Fool Rule Breakers stock-picking team. He didn't own shares in any of the companies mentioned in this article at the time of publication. Check out Tim's portfolio holdings and Foolish writings, or connect with him on Twitter as @milehighfool. You can also get his insights delivered directly to your RSS reader. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool is also on Twitter as @TheMotleyFool. Its disclosure policy is at least 10% better than other disclosure policies.