Equity Risk
The risk of financial loss from a decline in the market value of stocks held in a portfolio.
What is Equity Risk?
Equity risk is the possibility of loss arising from a decrease in the market price of stocks. It includes both systematic risk — the undiversifiable component driven by broad market movements, measured by beta — and unsystematic (idiosyncratic) risk — company-specific factors such as earnings misses, management failures, or competitive disruption, which can be reduced through diversification. The equity risk premium (ERP) is the additional return investors expect above the risk-free rate to compensate for bearing equity risk. Historically, the ERP has averaged roughly 4–6% annually in the US. Equity risk varies across market capitalizations, geographies, and sectors: small-cap stocks, emerging market equities, and cyclical sectors typically carry higher equity risk than large-cap developed-market shares. Investors reduce equity risk through diversification, allocation to other asset classes (bonds, cash, alternatives), and hedging strategies using options or inverse ETFs.
Example
During the 2022 bear market, the S&P 500 declined approximately 25% from peak to trough. An investor with 100% equity allocation experienced the full equity risk; one with a 60/40 stock-bond portfolio saw losses dampened by bond positions that partially offset equity declines. An investor who held put options on the index as insurance limited losses further, at the cost of the option premiums paid.