Consider Three Types of Private Preferred Stock Transactions, Each with Varying Degrees of Relevance to an Indication of Fair Value: Simple, Strategic, and Tranched Preferred Financing Last year, the AICPA issued guidance on evaluating private transactions with regards to their relevance in estimating the Fair Value of other securities within an enterprise via the back-solve method. The McLean Valuation Services Group  recaps that guidance and explains what it should mean in practice. Appraisers need to carefully follow specific criteria and they need to exercise reasonable judgment.