The biotech sector's endured an up-and-down 2014 after the immense gains captured in 2013's market rise, but don't tell that to fast-rising Biogen Idec (NASDAQ:BIIB). Biogen's stock has roared higher by more than 10% in 2014 after experiencing a tremendous run-up last year, topping the charts among big biotech stocks and giving hope to investors across the industry. Biogen's hit a home run with multiple sclerosis drug Tecfidera, which reeled in nearly $400 million in sales in the past quarter, but this company's not sitting still waiting for its next big success story.

Biogen scored again for investors recently when the Food and Drug Administration approved the company's developmental hemophilia B treatment Alprolix. While Biogen's relatively inexperienced in the hemophilia market, it's gearing up for a big push, and Alprolix is the first stepping stone to Biogen's plans for dominance in a market that heavyweights such as Pfizer (NYSE:PFE) and Bayer (NASDAQOTH:BAYRY) are fighting for.

Can Biogen score another investor success from the hemophilia market? Find out all about Alprolix's success -- and what Biogen plans to do for an encore -- in the video below as Motley Fool contributor Dan Carroll takes you through the latest in one of big biotech's hottest stocks.