2013 Difference Makers

No individual has had more influence on the stock and bond markets this year than Ben Bernanke.

Reed Hastings has transformed the way people watch TV and what they expect from digital content.

Preet Bharara has made an impact this year with his efforts to clean up Wall Street.

Billionaire inventor Elon Musk has challenged conventional wisdom in 2013.

Marissa Mayer has had a tremendous influence on floundering Yahoo in 2013.

Veteran investors Carl Icahn spent much of the year shaking up companies and it paid off.