Since I gave up politics for Lent this year, I’ve had more time to keep up with the deeper recesses of the financial press, which led me to Warren Buffett’s annual letter to the shareholders of Berkshire Hathaway. Buffett’s prose is a literary genre unto itself; a remarkably plain-spoken approach to making even the most complex and dull aspects of investment management simple and entertaining. If all “management letters” were penned as well, shareholders might actually read them. Perhaps that’s why they aren’t.