This document discusses preliminary performance data from PitchBook Benchmarks and how performance metrics may change as more fund data is reported over time. It analyzes how the one-year horizon IRR for private equity funds has shifted modestly between previous Benchmark publications. For example, the quarterly IRR for Q1 2019 increased from an initial 4.52% to 4.67% as more data was added. The document also explores preliminary performance data for Q1 2020 to gauge changes during a volatile period, serving as a case study for how metrics could fluctuate in extreme market conditions.