Polk Data, a worldwide leader in auto insight and marketing solutions, has released a report showing that the Ford (NYSE:F) Focus was the best-selling nameplate for 2012. The report also details a lot of strong numbers looking into 2013. Is this a clear win for investors, or are there some risks to consider here? In this video, Motley Fool industrials analyst Blake Bos breaks down the report, and takes a look at the fundamentals of Ford, to show investors what the key things to watch with this company will be this year.