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: Swedish seat belt and airbag maker Autoliv (NYSE: ALV) crashed 11% in intraday trading today after announcing its operating results and cash flows might be affected by ongoing antitrust investigations in the U.S. and Europe.

So what: The antitrust investigation isn't new news, nor is Autoliv's involvement. The company disclosed in June that European Commission representatives had visited two of the company's German facilities in relation to an antitrust probe.

Now what: Potential for the antitrust investigation to affect Autoliv's financial results is new news. Management said it doesn't know when the investigations will conclude or what their outcome will be. Thus, it can't estimate the potential impact on its financial results and cash flows -- although any effect is almost certain to be negative -- or indicate which reporting periods might be affected. One thing that is known: Uncertainty will pressure a stock's price.

Interested in more info on Autoliv? Add it to your watchlist by clicking here.

Fool contributor Cindy Johnson does not own shares of any company named above. 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 has a disclosure policy.