Diversification

Diversification is one of the fundamental principles of modern portfolio theory. The economist Harry Markowitz formulated mathematically in 1952 what investors had intuitively known: spreading wealth across weakly correlated investments reduces overall risk without necessarily sacrificing returns. Precious metals — above all gold and silver — play an important role in this concept, as they frequently act as a safe haven during periods of stock market stress.

Systematic and Unsystematic Risk

In financial theory, two types of risk are distinguished:

• Unsystematic (specific) risk: affects individual companies or sectors — e.g. a corporate scandal or a sector-specific slump. This risk can be almost completely eliminated through diversification.
• Systematic (market) risk: affects the entire market — e.g. recessions, interest rate turns or geopolitical crises. This risk cannot be diversified away, but can only be mitigated by adding non-correlated asset classes.

Precious metals have historically shown a low to negative correlation with equities and bonds, especially during periods of crisis. This makes them an effective building block in a diversified portfolio.

Diversification Dimensions at a Glance

Precious Metals as a Diversification Building Block

Within the precious metals asset class, further diversification is advisable. The gold-silver ratio shows the historical price relationship between the two metals and can provide indications of relative over- or undervaluation. In addition to gold and silver, platinum and palladium come into consideration; they are more strongly driven by industrial demand and thus exhibit different price drivers.

The formula for portfolio risk with two assets illustrates the diversification effect:

σ_P = √( w₁²·σ₁² + w₂²·σ₂² + 2·w₁·w₂·ρ₁₂·σ₁·σ₂ )

σ_P  = Portfolio risk (standard deviation)
w    = Weighting of the investment
σ    = Individual risk of the investment
ρ₁₂  = Correlation coefficient between investment 1 and 2

The lower ρ₁₂ (down to a minimum of −1), the stronger the risk-reducing effect of the combination.

Practical Implementation with Precious Metals

A precious metals savings plan enables the gradual build-up of a precious metals position while benefiting from the cost-average effect: through regular purchases at varying prices, high-price phases and more favourable entry points balance each other out. This significantly reduces timing risk.

Common recommendations from institutional investors suggest a precious metals allocation of 5–15% of the total portfolio. This benchmark, however, depends heavily on individual risk tolerance, investment horizon and the overall structure of the portfolio. Note: This does not constitute investment advice.

Tax Dimension

For physical precious metals in Germany, § 23 para. 1 sentence 1 no. 2 of the Income Tax Act (EStG) applies: gains from sales are tax-free after a holding period of one year (private disposal transaction). This rule applies to physical gold as well as physical silver, platinum and palladium. ETCs and certificates, by contrast, are generally subject to withholding tax (§ 20 EStG), regardless of the holding period.

At the time of purchase, the differences are also relevant: investment gold (bars and coins with a fineness of at least 995/1000) is exempt from VAT under § 25c UStG. Silver, platinum and palladium, however, are subject to the regular VAT rate of 19%. This difference noticeably affects the effective cost of entry when diversifying across precious metals. Note: This is not tax advice — individual review by a tax adviser is recommended.

In Brief

Diversification reduces portfolio risk by combining weakly correlated investments — precious metals make a stable contribution here, because they often move in the opposite direction to equities and bonds during periods of crisis. A broad mix of different metals, holding forms and asset classes is more effective than concentrating on a single value.