Across financial markets, bubble fears are growing. Many are fretting about overvalued stocks, over-generous credit and the turbo charge of crypto. Standing back from the fray, it’s time to ponder the thoughts of two giants. Inspired initially by his teacher Ben Graham and then for many years by his friend Charlie Munger, Warren Buffett needs little introduction. At the grand old age of ninety-four, the legendary investor continues to steer the fortunes of Berkshire Hathaway and share his wisdom with a worldwide audience.   As defined in his letter to Berkshire shareholders in 1999, the central tenet of his investment philosophy…