Portfolio Diversification Explained

In 30 seconds

  • Why diversification matters and how to achieve it effectively.
  • Uses 1 calculator(s) for hands-on examples

Diversification is one of the most powerful risk management tools available to investors. By spreading investments across different assets, you can reduce portfolio volatility without necessarily sacrificing returns.

Why Diversification Works

Different assets respond differently to market conditions.

When some investments decline, others may hold steady or increase.

This reduces overall portfolio volatility—the ups and downs are smoothed out.

Types of Diversification

Asset class diversification: stocks, bonds, real estate, commodities.

Geographic diversification: domestic vs international markets.

Sector diversification: technology, healthcare, financials, etc.

Company size diversification: large-cap, mid-cap, small-cap.

Measuring Diversification

The Herfindahl Index (HHI) measures portfolio concentration.

Lower HHI indicates better diversification.

Our portfolio risk tool calculates this automatically for your holdings.

FAQ

How many stocks do I need for diversification?

Research suggests 15-30 stocks across different sectors can capture most diversification benefits.

Can I be over-diversified?

Excessive diversification can lead to index-like returns with higher costs. Focus on meaningful diversification across uncorrelated assets.

Key Terms

Tools & Resources