Renato Guerrieri is Head of Quantitative Strategy, Liquid Alternatives, at Downing LLP. He works across quantitative research, systematic strategy development and front-office investment infrastructure, with a focus on designing, validating and implementing investment processes across equities, cross-asset portfolios and derivatives mandates. His work spans signal research, portfolio construction, allocation design, derivatives scenario engines, stress-test implementation and institutional research workflows for live investment mandates. He focuses on the full path from research thesis to portfolio implementation: signal durability, capacity, transaction costs, regime sensitivity, sizing, risk constraints and implementation discipline. He has developed systematic strategies and quantitative infrastructure across live fund environments, including systematic equity allocation, cross-asset portfolio construction, derivatives mandate stress testing and diversifying return-stream research. His perspective is practitioner-led: how systematic strategies are researched, sized, implemented, monitored and maintained inside institutional portfolios