The key factors determining this stock's price aren't complicated, even if it is difficult to predict how the market will feel about them.It isn't a household name... not here in America anyway. That's largely because it doesn't sell its product in the United States (at least not yet). If you've stumbled across BYD Company (BYDDY +0.67%), however, you probably liked what you saw -- like its profitability -- enough to consider taking on a position in China's electric vehicle giant. And understandably so.Befo ...