Summary Box: Sony sees worst loss ever

BAD OUTLOOK: Sony Corp. more than doubled its projected annual loss to 520 billion yen ($6.4 billion), which would be its worst loss ever.

THE REASON: A massive non-cash tax charge, which the company says stemmed from revaluing U.S. tax credits that are unlikely to be used because of its string of annual losses.

THE TRENDS: This would be the fourth year of losses for Sony. It has for years been struggling to regain the swagger and creative flair that made it a dominant force in the global electronics industry in the 1980s and early 1990s.