Investing Glossary

An ETF that automatically reinvests dividends back into the fund rather than paying them out to investors. The fund's Net Asset Value (NAV) grows to reflect the reinvested income. In most European countries, this avoids a taxable event on each dividend payment — you only pay capital gains tax when you eventually sell your shares.

An ETF that pays out dividends to shareholders, typically quarterly or annually. You receive cash in your brokerage account. In most European countries, these distributions are subject to dividend withholding tax. Belgian investors should generally avoid distributing ETFs due to higher TOB rates and 30% dividend withholding.

An ETF construction method where the fund actually holds the underlying securities it tracks. VWCE physically holds shares in ~3,700 companies. This is the most transparent structure. Some very large-index ETFs use "optimised sampling" — holding a representative subset of the index rather than every constituent.

An ETF construction method where the fund uses derivatives (usually a total return swap with a counterparty bank) to replicate index performance rather than holding the underlying stocks. Can be more tax-efficient in some jurisdictions. Introduces counterparty risk — if the swap counterparty defaults, there could be losses. Synthetic ETFs can qualify for French PEA accounts even if tracking non-EU indices.

Undertakings for the Collective Investment in Transferable Securities. The EU's regulatory framework for investment funds. A UCITS fund meets strict EU standards for investor protection, diversification, and liquidity. All UCITS funds must produce a KID (Key Information Document) in local languages. ETFs domiciled in Ireland or Luxembourg and trading on European exchanges are typically UCITS funds — and these are the only ETFs European retail investors can legally access.

Key Information Document. A standardised 2-3 page document required for all investment products sold to EU retail investors under the PRIIPs regulation. It covers the product's costs, risks, and performance scenarios in a consistent format. US ETF providers (Vanguard US, iShares US) have not produced KIDs for their US-listed funds — which is why EU residents cannot buy VOO, VTI, or QQQ.

Packaged Retail and Insurance-based Investment Products. EU regulation effective January 2018 that requires KID documents for all investment products sold to retail investors. The regulation is the direct reason European investors cannot access US-listed ETFs. It was designed to improve transparency and comparability of investment products across the EU.

Total Expense Ratio. The annual cost of holding an ETF, expressed as a percentage of your investment. A TER of 0.22% means you pay €22 per year for every €10,000 invested, automatically deducted from the fund's performance. The TER covers the fund manager's fee, custody costs, and administrative expenses. It does not include brokerage commissions you pay to buy and sell the ETF.

Ongoing Charges Figure. Essentially identical to TER. Some fund providers use OCF instead of TER; they represent the same concept. When comparing ETF costs, TER and OCF can be used interchangeably.

The fee charged when converting from one currency to another — for example, when a European investor buying a USD-denominated ETF must convert euros to dollars. Trading 212 charges 0.15%, DEGIRO charges 0.25% + €10 minimum, eToro charges 1.5%. This fee is often invisible — embedded in the exchange rate rather than charged separately. Minimise it by buying EUR-denominated UCITS ETFs.

An annual charge for holding assets at a broker, typically expressed as a percentage of portfolio value (e.g., 0.20%/year). Most modern European neo-brokers (Trading 212, XTB, DEGIRO) charge no custody fee. Traditional banks and older platforms commonly charge 0.2–0.5% annually — this is a significant hidden cost that erodes returns on larger portfolios over time.

A monthly charge applied when no trades are made within a set period. Interactive Brokers charges $10/month if your account generates less than $10 in commissions (waived above certain account sizes). eToro used to charge $10/month after 12 months of inactivity. Trading 212, XTB, and DEGIRO charge no inactivity fees.

Assets Under Management. The total market value of all assets held by a fund. A larger AUM generally indicates better liquidity (tighter bid-ask spreads), lower risk of fund closure, and greater institutional confidence. For UCITS ETFs, AUM above €500M is generally considered well-established; above €5B is considered very large.

Net Asset Value. The total value of all securities held by a fund, minus any liabilities, divided by the number of outstanding shares. The ETF's market price should closely track its NAV — if it diverges significantly, arbitrage mechanisms bring it back in line. For large ETFs, the market price and NAV are typically within 0.05% of each other.

The country where an ETF is legally registered. For UCITS ETFs, Ireland and Luxembourg are by far the most common domiciles. Ireland dominates because of its tax treaty with the US, which reduces withholding tax on US dividends from 30% to 15%. This matters: an equity ETF domiciled in Ireland keeps more of its US dividend income than one domiciled elsewhere.

The difference between the highest price a buyer will pay for a share (bid) and the lowest price a seller will accept (ask). For large, liquid ETFs like VWCE or IWDA, this spread is typically just 0.01–0.02% — negligible. For smaller ETFs with lower trading volume, spreads can be wider, effectively adding a hidden cost to each transaction.

The ability to buy a fraction of a single share or ETF unit rather than a whole one. If VWCE is priced at €130 and you want to invest €50/month, fractional shares let you do this. Trading 212 and eToro offer fractional shares on ETFs. DEGIRO and Interactive Brokers (standard) do not — you must buy whole units.

Payment for Order Flow. A practice where brokers route their customers' orders to specific market makers in exchange for payment. The market maker profits from the bid-ask spread, and the customer may not get the theoretically best available price. PFOF is banned in the UK and France, restricted in Germany. A common criticism of commission-free brokers — though for large, liquid ETFs the impact is typically negligible.

Tax deducted at source on dividends and interest, before the income reaches the investor. For US dividends, the standard rate for non-US investors is 30%. Ireland's tax treaty with the US reduces this to 15% for Irish-domiciled funds. This is why most major UCITS ETFs (VWCE, IWDA, CSPX) are domiciled in Ireland — they keep more of the dividend income.

Investing a fixed amount at regular intervals regardless of market conditions. When prices are high, you buy fewer shares; when prices are low, you buy more. Over time, this averages your purchase price and removes the pressure of trying to time the market. The most straightforward implementation: set up a monthly bank transfer and recurring purchase of your chosen ETF.

Adjusting your portfolio back to a target allocation when market movements have shifted the proportions. For a single-ETF portfolio (VWCE), rebalancing is unnecessary — the fund handles it internally. For a two-fund portfolio (IWDA + EMIM), if equities outperform and shift from 88/12 to 90/10, you'd sell some IWDA and buy more EMIM to rebalance. Annual rebalancing is typically sufficient.

The Dutch tax system's third box, which covers savings and investments. Unlike most European countries that tax capital gains only when realised, Box 3 taxes an assumed return on your wealth above a threshold (~€57,000 in 2026), regardless of actual returns. The tax is approximately 36% applied to the assumed return, effectively creating an annual wealth tax on investment accounts.

Germany's flat 25% withholding tax (plus solidarity surcharge, effective ~26.4%) on capital gains, dividends, and interest. Applied automatically by German brokers. The Sparerpauschbetrag (€1,000 annual allowance) exempts the first €1,000 of investment income per person per year.

A German tax exemption where 30% of gains from equity ETFs are tax-free. Applied automatically against the Abgeltungsteuer. The effective tax rate on equity ETF gains becomes approximately 18.5% rather than 26.4%. Applies to ETFs with at least 51% equity content — which includes VWCE, IWDA, CSPX, and EQQQ.

A German advance tax on accumulating ETFs, applied annually even if no shares are sold. It's calculated as a small percentage of the fund's value based on a reference rate (the Basiszins). In years with very low interest rates, this amount is near zero. German brokers calculate and withhold this automatically. It's essentially a way of preventing indefinite tax deferral on accumulating funds.

Taxe sur les Opérations de Bourse (Transaction Tax). A Belgian tax applied on both the purchase and sale of securities. For most UCITS ETFs domiciled in Ireland, the rate is 0.12% on each transaction. For distributing ETFs structured differently, the rate can be 1.32%. Belgian investors should always verify the TOB rate before purchasing an ETF, and generally prefer accumulating ETFs to avoid the higher distributing rate.

Plan d'Épargne en Actions. A French tax-advantaged account for equity investments. After 5 years, gains are exempt from income tax — only 17.2% social charges apply on withdrawal. Maximum contribution: €150,000 per person. PEA can only hold ETFs with 75%+ EU/EEA equity content — this disqualifies global ETFs like VWCE and IWDA. Some synthetic ETFs are structured to qualify for PEA while providing world equity exposure.

Investeringssparkonto (Investment Savings Account). A Swedish account type where instead of paying capital gains and dividend tax, investors pay a small annual flat fee based on their account value. In 2026, approximately 0.375% of portfolio value per year. This makes ISK dramatically more tax-efficient than a standard account for long-term investors — effectively replacing 30% capital gains tax with a small flat fee.

Polish tax-advantaged retirement accounts. IKE (Indywidualne Konto Emerytalne) — gains are fully tax-free on retirement withdrawal. Annual limit: 3× average monthly salary (~PLN 23,000). IKZE (Indywidualne Konto Zabezpieczenia Emerytalnego) — contributions are tax-deductible; withdrawals taxed at a flat 10%. Both available at XTB for Polish investors.

A German-language term for an automated savings plan — a regular, automated investment of a fixed amount into a fund or ETF. Most German brokers (Scalable Capital, Trade Republic, DKB) offer Sparplan functionality. You set the amount, frequency (monthly/quarterly), and fund, and the broker handles the purchase automatically.