The classic guide to asset allocation with fresh insights and strategies that successfully met the challenges of the recent bear market "Asset Allocation" is the premier resource for understanding and applying historically-tested asset allocation principles to design individually tailored portfolio strategies focused on long-term results. The bear market of the early 2000's confirmed how asset allocation can increase returns and reduce risk-and it's all covered in detail in the new fourth edition. Grounded in the principles of modern portfolio theory, the author explains why and how asset allocation works. He also addresses the practical side of investing with advice on resolving implementation problems and working with emotional and psychological traps that can prevent investment success