Mathematical Derivations and Practical Implications for the Use of the Black-Litterman Model

TL;DRAbstract

Executive Summary. In this article, the financial portfolio model often referred to as the Black-Litterman model is described, and then mathematically derived, using a sampling theoretical approach. This approach generates a new interpretation of the model and gives an interpretable formula for the mystical parameter, τ, the weight-on-views. The practical implications of the model are discussed, along with how portfolio fund managers should arrive at model input values and what consideration must be weighted beforehand.

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