What it is
Diversification is a risk management strategy that involves investing in a variety of assets within a portfolio. The goal is to minimize exposure to any single asset or risk. By combining different types of investments—such as stocks, bonds, real estate, or commodities—that react differently to market events, an investor can reduce the impact of poor performance from any one security on the overall portfolio.
Modern portfolio theory suggests that diversification can help achieve a given level of return with less risk, or higher returns for the same risk. Investors often diversify across asset classes, geographic regions, and sectors. For instance, holding both growth stocks and value stocks, or domestic and international equities, can smooth out returns. It is a fundamental principle for long-term investing success.
Why it matters
Diversification helps protect your portfolio from significant losses by spreading risk across different investments. It's essential for long-term stability.
Reviewed under editorial standardsUpdated September 26, 2026Not investment advice