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 commercial vehicle parts maker Accuride (NYSE:ACW) dropped as much as 31% today after the company released earnings.

So what: Third-quarter sales dropped 17.1% to $155.3 million, which was well short of the $170.7 million analysts expected. Net loss dropped 47% to $8.4 million, or $0.18 per share, but was also well above the $0.10 per share expected loss.  

Now what: It looks like both industry and competitive pressures are hurting Accuride across the board. Class 8 vehicle production was down 1.8% from a year ago when the industry was expecting an increase, which hurt both the top and bottom line. The big surprise was a 32.7% decline in revenue for the Brillion Iron Works division as construction, mining, and oil and gas equipment orders slowed. I don't see any positives here for Accuride and think it's time to jump ship on the stock.