RT Journal Article SR Electronic T1 A Practitioner Perspective on Trading and the Implementation of Investment Strategies JF The Journal of Portfolio Management FD Institutional Investor Journals SP 30 OP 44 DO 10.3905/jpm.2022.1.371 VO 48 IS 6 A1 Joseph A. Cerniglia A1 Frank J. Fabozzi YR 2022 UL https://pm-research.com/content/48/6/30.abstract AB In this article, we discuss the fundamentals of the market structure and trading, along with how these impact the execution of investment strategies. From a practitioner perspective, we bring together this information to explore different models and processes to assist in achieving optimal execution of trading strategies. After providing a taxonomy of trading costs, we discuss how these costs, particularly market impact costs, are estimated and forecasted. Proposed models for optimal execution designed to get the best execution of a single trade, or sometimes a sequence of trades, are reviewed.