Seven tricky questions for Mr Buffett

Andrew Hill:

Until this week, only one topic was off-limits for questions to Warren Buffett at Saturday’s annual gathering of Berkshire Hathaway shareholders in Omaha: how serious is the Dave Sokol affair?
On Wednesday, however, the company issued an 18-page report from its audit committee about the former star executive’s trading in shares in Lubrizol, a chemicals group later bought by Berkshire, and declared open season for all questions to Mr Buffett.
Here are my seven:
1. How serious is the Dave Sokol affair?
You are the world’s most famous long-term investor. Recently, Berkshire’s shares have lagged behind the S&P 500, but your record of outperformance over more than four decades speaks for itself. Even big, conservative bets, such as the 2009 investment in Burlington Northern Santa Fe railway, have been well timed. But Mr Sokol was a frontrunner to succeed you as chief executive. You lauded him regularly in your annual letter to shareholders. His abrupt resignation and the circumstances surrounding it seem to suggest that this is more than just a blip.
2. Do you love some of your managers too much?

Obituary: The man who gave the world CDs

Michiyo Nakamoto:

Norio Ohga, who was instrumental in bringing the world the compact disc and the PlayStation and is credited with building Sony into a global electronics and entertainment group, has died of organ failure aged 81.
“It is no exaggeration to attribute Sony’s evolution beyond audio and video products into music, movies and games, and subsequent transformation into a global entertainment leader to Ohga-san’s foresight and vision,” Howard Stringer, Sony’s chairman and chief executive, said in a statement.
“By redefining Sony as a company encompassing both hardware and software, Ohga-san succeeded where other Japanese companies failed,” Mr Stringer said.
A musician by training, who was a close friend of Austrian conductor, Herbert von Karayan, Mr Ohga led Sony during perhaps its most successful years, as president from 1982 until 1995, when the Japanese electronics maker became one of the most admired companies in the world.
It was under Mr Ohga that the name Sony came to symbolise Japanese manufacturing excellence and to define what was “cool” in the world of electronics – an image encapsulated in the catchphrase, “It’s a Sony.”