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 milk magnate Dean Foods (NYSE: DF) gained more than 11% in intraday trading after a wave of news out of the company.

So what: It was a news-heavy day for Dean Foods, as the company announced a senior debt offering, an antitrust lawsuit settlement, and a new chief accounting officer. And just for good measure, the company also affirmed its fourth-quarter outlook. Dean will be offering $400 million in new senior notes, and while we don't know what they'll cost the company yet, the offering, along with looser debt covenants, inspired Standard & Poor's to raise its rating outlook on Dean from negative to stable. Meanwhile, the company may be close to clearing up the overhang from a class-action antitrust lawsuit in Vermont, as it agreed to pay $30 million to settle.

Now what: Investors at Dean Foods needed some good news in a bad way, because the company has been facing  pricing pressures from stores such as Wal-Mart and Kroger (NYSE: KR) while its commodity costs continue to rise. The stock, meanwhile, has been socked, and has grabbed the dubious title of "worst performing S&P stock this year." Tough industry dynamics and a heavy debt load are definitely working against the company, but shares are looking cheap, and often the best time to invest is when the clouds are gathering. My fellow Fool -- and Rising Star analyst -- Jim Mueller has this stock on his watchlist, and if it gets much cheaper, I won't be able to help but put it on mine.

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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 Motley Fool 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.