The C25 index looks like a diversified basket of Danish equities, but in reality it is one of the most concentrated major indices in the world. Novo Nordisk alone accounts for roughly 35% of the index, and healthcare, industrials, and financials together make up over 80%. For Denmark-based investors who hold a C25 ETF or individual Danish shares, this concentration creates significant portfolio risk. This guide shows you how to diversify beyond the C25 using sector ETFs, global funds, and smart portfolio construction.
Why the C25 Is Not Diversified
Most investors assume a 25-stock index provides adequate diversification. The C25 does not.
The Novo Nordisk Problem
Novo Nordisk represents approximately 35% of the C25 index. This means:
- A 20% decline in Novo Nordisk would drag the entire index down by roughly 7%, regardless of what other stocks do.
- Your “diversified” Danish equity portfolio is substantially a single-company bet.
- If Novo Nordisk’s GLP-1 drug pipeline faces setbacks — regulatory rejection, competitor breakthroughs, safety concerns — the entire Danish market suffers.
Sector Imbalance
The C25 is structurally overweight healthcare and industrials and structurally underweight technology, consumer discretionary, and emerging sectors. Compare the C25 to a global benchmark:
| Sector | C25 Weight | MSCI World Weight |
|---|---|---|
| Healthcare | 35–40% | ~13% |
| Industrials | 20–25% | ~13% |
| Financials | 15–20% | ~15% |
| Technology | 5–10% | ~23% |
| Consumer | 10–15% | ~11% |
| Energy | 5–10% | ~5% |
The gap is stark. Danish investors who only hold C25 ETFs miss out on the largest technology companies in the world and are overexposed to a handful of Danish sectors.
Geographic Concentration
Even within Denmark, the C25 is concentrated. Most of its companies generate revenue globally, but their listing, governance, and investor base are Danish. This creates home bias — the tendency to overinvest in domestic markets — which is a well-documented source of portfolio underperformance.
Strategy 1: Add Global Equity ETFs
The simplest way to diversify beyond the C25 is to add a global equity ETF to your portfolio. This instantly provides exposure to thousands of companies across all sectors and geographies.
Recommended Global ETFs
| ETF | Ticker | Expense Ratio | What It Covers |
|---|---|---|---|
| Vanguard FTSE All-World | VWRL | 0.22% | ~3,700 stocks across developed and emerging markets |
| iShares MSCI World | IWDA | 0.20% | ~1,500 developed market stocks |
| iShares MSCI ACWI | SSAC | 0.20% | ~2,900 stocks including emerging markets |
| Amundi MSCI World | LCWD | 0.38% | Developed markets, European-domiciled |
These ETFs are available on Nordnet, Saxo Bank, and most Danish brokers. They are traded in EUR or USD on European exchanges.
How Much to Allocate
A common approach is to hold a core global equity position alongside your Danish holdings:
- 70% global equity ETF + 30% Danish shares/C25 ETF — heavy diversification, minimal home bias.
- 50% global equity ETF + 50% Danish shares — balanced approach, maintaining meaningful Danish exposure.
- 80% global equity ETF + 20% Danish shares — for investors who want to reduce Danish concentration to a minimum.
The right split depends on your risk tolerance, conviction in Danish equities, and whether you have non-investment reasons to maintain DKK exposure (such as living and spending in Denmark).
Strategy 2: Use Sector ETFs to Fill Gaps
If you want to maintain some Danish exposure but fill the gaps left by the C25’s sector imbalance, sector ETFs are the most targeted approach.
Technology Gap
The C25 has minimal technology exposure. A global technology ETF fills this gap:
- iShares MSCI World Technology ETF — Large-cap tech across developed markets, including Apple, Microsoft, NVIDIA, and ASML.
- Lyxor Nasdaq-100 ETF — Tracks the Nasdaq-100, heavy on US mega-cap tech.
- Xtrackers MSCI World Information Technology — Low-cost option for broad tech exposure.
A 10–15% allocation to a technology ETF can significantly improve your portfolio’s exposure to innovation and growth.
Clean Energy Tilt
Denmark is a green energy leader, but the C25 only provides partial exposure through Ørsted and Vestas. A clean energy ETF broadens this:
- iShares Global Clean Energy ETF (INRG) — 100 companies in wind, solar, and other renewables globally.
- Lyxor New Energy ETF — Broader clean energy exposure including hydrogen and battery technology.
These ETFs complement Danish green energy holdings by adding international renewable energy companies.
Healthcare Balance
If you hold Novo Nordisk individually or through a C25 ETF, you already have substantial healthcare exposure. However, if you want broader healthcare diversification beyond Danish pharma:
- VanEck Pharmaceutical ETF — Global pharmaceutical companies, reducing Novo Nordisk concentration.
- iShares Healthcare Innovation ETF — Biotech and medical devices, providing growth-oriented healthcare exposure.
The goal is not to eliminate Danish healthcare — it is a genuine strength — but to ensure your healthcare exposure is not 100% dependent on a single company.
Financials and Defensive Tilt
- iShares Global Financials ETF — Banks, insurers, and asset managers globally. Useful if you want financial exposure beyond Danske Bank and Nordea.
- Vanguard FTSE All-World High Dividend Yield ETF — Tilts toward higher-dividend stocks, which tend to be in financials, utilities, and consumer staples.
Strategy 3: Nordic Diversification
Rather than jumping straight to global ETFs, some investors prefer to diversify within the Nordic region first. Nordic economies are correlated but not identical, and Nordic ETFs provide meaningful diversification while maintaining cultural and geographic familiarity.
Nordic ETF Options
| ETF | Ticker | What It Covers |
|---|---|---|
| Nordea Nordic Market | — | Denmark, Sweden, Finland, Norway |
| iShares MSCI Nordic | — | Large and mid-cap Nordic stocks |
| Lyxor MSCI Nordics | — | Broad Nordic exposure |
Sweden’s market, for example, has significantly more technology exposure (Ericsson, Spotify, Klarna) than Denmark’s. Adding Nordic exposure dilutes Novo Nordisk’s weight while keeping you within a familiar economic region.
Strategy 4: Portfolio Construction for Danish Investors
Combining the strategies above, here are three model portfolios for Denmark-based investors with different risk profiles.
Conservative Portfolio
Designed for investors who want stability and income.
| Allocation | Vehicle | Purpose |
|---|---|---|
| 40% | Vanguard FTSE All-World (VWRL) | Global diversification |
| 20% | iShares OMXC25 ETF | Danish market exposure |
| 15% | iShares Global Financials ETF | Income and domestic economy |
| 15% | iShares Global Consumer Staples ETF | Defensive, dividend-paying |
| 10% | Cash or Danish government bonds | Liquidity and safety |
Balanced Portfolio
Designed for long-term growth with moderate risk.
| Allocation | Vehicle | Purpose |
|---|---|---|
| 50% | iShares MSCI World (IWDA) | Global developed markets |
| 20% | Danish individual stocks (Novo Nordisk, Mærsk, Danske Bank) | Home bias, conviction picks |
| 15% | iShares MSCI World Technology ETF | Fill the tech gap |
| 10% | iShares Global Clean Energy ETF | Green energy tilt |
| 5% | VanEck Pharmaceutical ETF | Broader healthcare |
Growth Portfolio
Designed for investors with a long time horizon and higher risk tolerance.
| Allocation | Vehicle | Purpose |
|---|---|---|
| 40% | iShares MSCI ACWI (SSAC) | Global including emerging markets |
| 20% | iShares MSCI World Technology ETF | Technology overweight |
| 15% | Danish individual stocks | Conviction picks |
| 15% | iShares Global Clean Energy ETF | Energy transition |
| 10% | Lyxor Nasdaq-100 ETF | US mega-cap growth |
These are illustrative examples, not personalised financial advice. Adjust allocations based on your own situation, risk tolerance, and investment horizon.
Tax Considerations for Sector ETFs
ETFs in Denmark
ETFs are taxed as individual shares in Denmark, not as investment funds. This means:
- You pay tax only when you sell (capital gains) or receive dividends.
- No annual tax on unrealised gains — unlike Danish investment funds (investeringsforeninger).
- Dividend withholding varies by domicile: Irish-domiciled ETFs (most popular on European exchanges) withhold 15% US dividend tax, which is reclaimable to varying degrees.
Aktiesparekonto for Sector ETFs
The aktiesparekonto offers a flat 17% tax rate on gains and dividends, with a 2026 contribution limit of DKK 135,900. Sector ETFs held in an aktiesparekonto benefit from this lower rate.
Prioritise holding your highest-expected-return ETFs in the aktiesparekonto first. Technology and clean energy ETFs, which tend to have higher growth potential, may benefit most from the tax-efficient wrapper.
For details, see our Danish Aktiesparekonto Deep Dive.
Depot Taxation
ETFs held in a standard depot (taxable brokerage account) are subject to the standard Danish share tax rates:
- 27% on the first DKK 79,400 of annual gains and dividends (2026).
- 42% on amounts above that threshold.
Married couples each get their own DKK 79,400 threshold.
Common Mistakes to Avoid
1. Overconcentration in Danish Shares
Many Danish investors hold 80–100% of their portfolio in Danish stocks. While home bias is natural, it creates unnecessary risk. Denmark represents less than 1% of global equity market capitalisation. Holding 50%+ of your portfolio in Danish stocks is a significant bet against diversification.
2. Ignoring Sector Overlap
If you hold a C25 ETF, individual Danish shares, and a global ETF, check for overlap. You may be more exposed to Novo Nordisk or Danish industrials than you realise. Use your broker’s portfolio analysis tools to identify double-ups.
3. Chasing Last Year’s Returns
Sector ETFs can tempt investors to chase performance. A clean energy ETF that doubled last year may not repeat that performance. Stick to your target allocation and rebalance periodically rather than chasing热点.
4. Forgetting Currency Risk
Global ETFs are typically denominated in EUR or USD. While the DKK is pegged to the euro (minimal currency risk), USD-denominated ETFs introduce exchange rate fluctuations. This is generally acceptable for long-term investors but worth understanding.
5. Neglecting Tax-Efficient Account Placement
Where you hold your ETFs matters. Use the aktiesparekonto for your highest-growth ETFs, and hold dividend-paying ETFs in tax-advantaged accounts where possible. For more on account types, see our Danish Investment Account Types guide.
How to Implement These Strategies
Step 1: Assess Your Current Exposure
Review your existing portfolio. What percentage is in Danish stocks? Which sectors are you exposed to? How much is in Novo Nordisk directly or indirectly?
Step 2: Define Your Target Allocation
Based on your risk tolerance and goals, decide on a target split between Danish, Nordic, European, and global equities. Use the model portfolios above as a starting point.
Step 3: Choose Your ETFs
Select ETFs that fill the gaps in your current portfolio. If you are underweight technology, add a technology ETF. If you want cleaner energy exposure, add a clean energy ETF.
Step 4: Open the Right Accounts
Use your aktiesparekonto for the ETFs with the highest expected returns. Hold remaining ETFs in a standard depot.
Step 5: Set Up Regular Investments
Consider setting up monthly savings plans through Nordnet or Saxo Bank. Regular investing smooths out market volatility through pound-cost averaging and removes the temptation to time the market.
Summary
The C25 is a convenient benchmark, but it is not a diversified portfolio. Novo Nordisk’s 35% weight and the index’s structural underweight to technology mean that Danish investors who only hold C25 ETFs are taking on more concentration risk than they may realise.
The solution is straightforward: diversify globally, use sector ETFs to fill gaps, and construct a portfolio that captures Denmark’s strengths without being trapped by its concentration. Start by assessing your current exposure, define a target allocation, and implement it using tax-efficient accounts like the aktiesparekonto.
For further reading, see our Danish Stock Market Sectors guide and Danish ETFs vs Investment Funds comparison.