The investment bank era is over, and with it the salad days of leverage. September was once again the worst month of the year for stocks and a darkly historic time for the financial industry. Fear has gripped the markets, and the Wall starts October at heights never seen before. The next 12 months will likely offer the single best buying opportunity since the 1970s. The goals are simple: Survive the intense turmoil and take advantage of extraordinary stock price dislocations that offer up great companies at great prices. If you don’t believe me, you might want to check out the “Buy” tickets already being written by the best stock picker ever out in Omaha.