A Single-ETF Portfolio in Belgium
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What are the limitations of a single-ETF approach?
Despite its tax and operational advantages, the single-fund strategy does come with a few trade-offs. The investor concentrates their exposure on a single issuer, which limits institutional diversification. Moreover, this 100% equity approach does not include a bond allocation, reducing the ability to modulate the portfolio's overall risk during periods of high market volatility. Finally, while holding a single ETF avoids the tax friction associated with intermediate rebalancing, it offers no protection against the 10% capital gains tax applicable since January 1, 2026, upon the final sale of shares.
``` Replaced: ```htmlWhat are the limitations of a single-ETF approach?
Despite its tax and operational advantages, the single-fund strategy does come with a few trade-offs. The investor concentrates their exposure on a single issuer, which limits institutional diversification. Moreover, this 100% equity approach does not include a bond allocation, reducing the ability to modulate the portfolio's overall risk during periods of high market volatility. Finally, while holding a single ETF avoids the financial friction associated with intermediate rebalancing, it offers no protection against the 10% capital gains tax upon the final sale of shares.
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Simplicity as a defensive tactic
Building a stock market portfolio in Belgium now requires an analysis that goes well beyond simple market fundamentals. Faced with mounting administrative constraints—from the unavoidable TOB to the capital gains tax in effect since January 1, 2026—the legal structure of an investment directly determines its financial viability.
As taxation becomes increasingly complex, global accumulating instruments stand out as a rational response for capturing growth. Restricting your portfolio to a single fund should no longer be seen as a default solution for beginner investors, but rather as a deliberate defensive tactic. By internalizing arbitrage,
