What Is a Portfolio Diversification Score?

What the score measures

A diversification score compresses several concentration metrics into one number. The idea is simple: a portfolio holding a single stock is less diversified than one holding twenty stocks across five sectors and three countries. The score doesn't predict returns — it just describes how spread out your capital is.

Common inputs

• Position concentration — the weight of your largest holdings versus the total portfolio.
• Sector exposure — how much of the portfolio is in a single sector such as Technology or Financials.
• Country exposure — how much is concentrated in one country's stock market.
• Number of holdings — very few holdings inherently caps diversification.

How Stockrove's score works

Stockrove combines position weights, sector exposure, and country exposure into a single 0–100 score. Sector and country classifications come from the underlying market data — missing classifications are excluded from the calculation so the score isn't skewed by incomplete data. The full inputs are documented on the Methodology page.

Limitations

• Diversification is not a substitute for asset-class diversification (bonds, cash, real estate).
• Two tech stocks with different tickers are still concentrated in one sector.
• Currency and country diversification can still be correlated during global shocks.
• The score depends on classification quality — missing sector data reduces accuracy.

How to improve it (thoughtfully)

Rebalancing to add sectors and geographies you're underexposed to can raise the score. But don't buy random stocks just to move a number — every position should have a thesis. Diversification is a risk-management tool, not a return-generation strategy.