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 Bona Film Group Limited, (UNKNOWN:BONA.DL) were landing on the cutting room floor today, falling as much as 14%, and finishing down 6% after a disappointing fourth-quarter earnings report.

So what: The vertically integrated Chinese film company said revenues in the quarter slid 20%, to $42.8 million, though earnings per share improved substantially from a loss of $0.09 to $0.01 per-share profit. Analysts had expected a $0.02 profit, however. CEO Yu Dong said the company had "delivered solid results in 2013, driven by the release of 14 films domestically that generated an approximate 10% market share of domestic box office receipts." 

Now what: Bona Film has been a volatile stock during the past year, so I wouldn't be too concerned with today's drop. For the first quarter, the company expects a per-share profit of $0.02-$0.03, though analyst estimates were unavailable for comparison. Still, a 10% market share is nothing to sneeze at, especially for a small company like Bona in a growing market. The studio also has prominent backers including 21st Century Fox, and the Chinese conglomerate Fosun, indicating that it is well staked should it need financial help. Long term, I expect shares to move higher.   

Jeremy Bowman 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.