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 trucker YRC Worldwide (Nasdaq: YRCWD) were down more than 10% in intraday trading -- yes, again -- after a very pessimistic report from a Morgan Keegan analyst.

So what: Just yesterday, we reviewed similar action from YRC, and today's move is largely based on the same factors. But this time, instead of being driven simply by the decidedly bearish momentum on the stock, the push came from an initiating report on YRC shares in which the analyst not only hit it with an "underperform" rating, but applied a bleak $0 price target.

Now what: Nothing has really changed since yesterday, save the addition of one additional opinion on the stock -- albeit a supposedly expert one. The possibility of total loss is hardly breaking news, and investors who weren't already comfortable with the possibility that this stock could leave them with bupkis had no business investing in YRC in the first place. The company's current predicament makes YRC shares unsuitable for most investors; if you do want to take a chance on it, be ready to wade through a lot of Securities and Exchange Commission paperwork to ensure that you know exactly what's going on.

Interested in more info on YRC Worldwide? Add it to your watchlist.

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Fool contributor Matt Koppenheffer does not own shares of any of the companies mentioned. You can check out what Matt is keeping an eye on by visiting his CAPS portfolio, or you can follow Matt on Twitter @KoppTheFool or on his RSS feed. The Fool’s disclosure policy assures you no Wookiees were harmed in the making of this article.