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 engine and truck maker Navistar International (NYSE:NAV) fell 11% today after the company idled a plant.

So what: Navistar's West Point, Mississippi plant is suspending production, and 80 workers were notified of the change today. The sequester, and a drawdown in combat in Afghanistan, has led to lower demand for defense vehicles. 

Now what: This isn't surprising given budget cuts, and Navistar has had a tough time adapting to a changing environment over the past year. The company's massive losses have put investors on edge, and even lower demand isn't good long term. This is definitely a "wait and see" stock, because I'd like to see a profit and growing revenue before jumping in, and Navistar is reporting just the opposite.

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

Fool contributor Travis Hoium has no position in any stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. 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.