6. Olympus:
Except for market leaders like Canon, Sony and Nikon, no one wants to be in the digital camera business anymore. Worldwide unit sales are down 18% in 2012 since their peak in 2010 and are accelerating this year. It is no surprise then that Olympus, which only has 7% market share, has failed to generate a profit from its imaging business in any of the past three years. The decline caught the company’s management off guard. Actual sales were less than two-thirds of forecasts.