To Measure Trustee Breach of Fiduciary Duty Damages The but for investment portfolio is a tool that damages analysts utilize to estimate economic damages when there is an allegation of a breach of fiduciary duty with regard to the management of an investment. In its simplest form, the but for investment portfolio estimates the value of a portfolio but for the alleged breach of fiduciary duty. Case law precedents established the but for investment portfolio analysis as a method to estimate economic damages on a market adjusted basis. While the concept of a but for investment portfolio analysis is simple,…