One of the world’s richest men has invested heavily in General Motors since the US Government began to sell off its stake in the carmaker. Berkshire Hathaway chairman and Warren Buffett had 40 million shares in GM on June 30 – up 60 per cent from the stake Berkshire reported to the US Securities and Exchange Commission on March 31. His stake is almost 3 per cent of GM … [Read more...] about Investor Buffett buys big chunk of GM