Portfolio Diversification with Gold: Optimal Allocation for Swiss Investors

Portfolio diversification with gold is backed by decades of academic research. Gold's low correlation with equities and bonds makes it one of the most efficient diversifiers available. This guide provides a framework for Swiss investors.

The Academic Case: How Much Gold?

Research by Erb and Harvey (2013, updated 2024) and the World Gold Council's portfolio analysis consistently finds that adding 5–15% gold to a balanced equity/bond portfolio improves risk-adjusted returns (Sharpe ratio) and reduces maximum drawdown. The optimal allocation varies by the investor's risk tolerance: conservative investors benefit most from gold's crisis-hedging properties.

Swiss-Specific Considerations

For Swiss investors: (1) Gold is denominated in USD — exposure to USD/CHF adds currency risk that partially offsets gold's diversification benefit in CHF terms. (2) Switzerland's domestic equities (SMI) have a lower correlation with gold than US equities — so gold's diversification value for Swiss portfolios is somewhat lower than for US-domiciled portfolios. (3) The CHF itself acts as a safe haven — partly substituting for gold's defensive function.

Practical Frameworks

• Conservative (capital preservation): 15–20% gold allocation. Prioritises crisis resilience.
• Balanced: 7–12% gold. Industry standard for mixed portfolios.
• Growth-oriented: 5% gold as a minimum diversifier. Lower allocation as equities dominate.