Alleghany's Shares Plunged: What You Need to Know

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 property and liability insurer Alleghany (NYS: Y) plunged as much as 10.1% on very heavy morning trading.

So what: Thanks to a sweetened offer filed Friday night, Alleghany is winning a bidding war over reinsurer and former AIG (NYS: AIG) subsidiary Transatlantic (NYS: TRH) . The market reaction indicates that investors would rather see bidding rivals Validus (NYS: VR) , Allied World (NYS: AWH) , or even Berkshire Hathaway (NYS: BRK.B) walking away with the prize, given the rapidly rising buyout prices.

Now what: Transatlantic's largest shareholder, Davis Selected Advisors, has opposed earlier bids, but likes this one. That's a sure sign that Alleghany isn't getting much of a deep-value deal here, and with this many serious suitors in line you really have to accept a big price tag. Is Alleghany walking away with the belle of the ball, or will another cavalier raise the price once again? The only way to know for sure is by keeping a close eye on the whole gang:

At the time this article was published Fool contributor Anders Bylund holds no position in any of the companies mentioned. The Motley Fool owns shares of Berkshire Hathaway. Motley Fool newsletter services have recommended buying shares of Alleghany and Berkshire Hathaway. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinion, but we all believe that considering a diverse range of insights makes us better investors. Check out Anders' holdings and bio, or follow him on Twitter and Google+. We have a disclosure policy.

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