Decades of Data: United States 1900–2020
The 2020 US edition of our annual report on the history of financial markets provides context for the range of returns investors can expect from equities, bonds, and cash; reveals the importance of various components of equity returns; examines the evidence for equity mean reversion; and reviews the relationship between initial valuations and subsequent returns for equities and bonds. It also analyzes the historic economic declines and sharp asset price movements that resulted from the COVID-19 pandemic in 2020.