Practical portfolio performance measurement 5 performance attribution 87 arithmetic attribution 88 brinson hood and beebower 88 asset allocation 89 the measurement of portfolio performance should be part of the investment decision process not external to it. Performance measurement is the quality control of the investment decision process enabling money managers to calculate return understand the behaviour of a portfolio of assets communicate with clients and determine how performance can be improved. Practical portfolio performance measurement and attribution may not be great bedtime reading but it is to performance measurement and attribution what david weisss classic after the trade is made processing securities transactions is to back office operations an invaluable reference for practitioners. Focusing on the practical use and calculation of performance returns rather than the academic background practical portfolio performance measurement and attribution provides a clear guide to the role and implications of these methods in todays financial environment enabling readers to apply their knowledge with immediate effect