Drawing on more than ten thousand hitherto unavailable letters and diary entries, bestselling author Niall Ferguson tells the story of Siegmund Warburg, a complex man who was as much a psychologist, a politician, and an actor-manager as a banker. An obsessive perfectionist with an aversion to excessive risk, Warburg-and the S. G. Warburg firm-adopted a financial philosophy that was the antithesis of the debt-fueled, algorithm-driven banking of our time. In High Financier, Niall Ferguson recaptures the meticulous business methods and strict ethical code that set Warburg apart from the mere speculators and traders who inhabit today's financial world.