Before You Start
- Basic understanding of what ETFs are and how they trade on stock exchanges
- Access to a European brokerage account (e.g., DEGIRO, Trade Republic, Scalable Capital, Interactive Brokers)
- Ability to view live ETF quotes and order books via your broker or a platform like Xetra, Euronext, or LSE
Time needed: 30–60 minutes (including research and platform navigation)
What you'll need: Internet connection, broker/platform login, notebook or spreadsheet for notes
Understanding ETF liquidity Europe is essential for any investor seeking to minimize costs and avoid nasty surprises when buying or selling exchange-traded funds. This tutorial will walk you through practical, step-by-step methods for evaluating ETF liquidity and bid-ask spreads on European exchanges, using real tools and examples. By the end, you’ll know how to select liquid ETFs, read order books, and trade smarter on major EU markets.
Step 1: Understand What ETF Liquidity and Spreads Mean
What to do: Start by clarifying the two key concepts:
- ETF liquidity: How easily and quickly an ETF can be bought or sold on an exchange without significantly affecting its price.
- Bid-ask spread: The difference between the highest price buyers are willing to pay (bid) and the lowest price sellers are willing to accept (ask).
Why it matters: Low liquidity and wide spreads can eat into your returns, especially for large trades. In Europe, ETF liquidity is often fragmented across several exchanges, making assessment more complex than in the US.
What can go wrong: If you ignore liquidity, you might pay much more to buy (or get much less when selling) than the ETF’s true value. This is especially risky with niche or low-volume ETFs.
Step 2: Identify the Major Exchanges for Your ETF
What to do: Check which exchanges your ETF trades on. In Europe, leading venues include:
- Xetra (Frankfurt)
- Euronext (Amsterdam, Paris, Milan, etc.)
- London Stock Exchange (LSE) (for EUR- and GBP-denominated ETFs)
- SIX Swiss Exchange
- Borsa Italiana
Use your broker’s ETF search, or the fund provider’s website, to see available listings. For example, iShares Core MSCI World UCITS ETF (Acc, EUR, ISIN: IE00B4L5Y983) is listed on Xetra (WKN: A0RPWH), Euronext Amsterdam (Ticker: IWDA), and other venues.
Why it matters: European ETF liquidity is exchange-specific. An ETF may be highly liquid on Xetra but illiquid on Euronext Paris. Always check the venue where you’ll trade.
What can go wrong: Trading on a thinly traded exchange can result in higher costs—even if the ETF is popular elsewhere.
Step 3: Find and Interpret the Order Book
What to do: Access the order book (“Level 2” data) for your ETF on your broker or via the exchange website. Here’s how on popular platforms:
- DEGIRO: Search for the ETF, click its name, and select the “Order book” tab.
- Trade Republic: Tap Search → enter ETF name or ISIN → select ETF → scroll down to “Order Book”.
- Scalable Capital: Search for ETF, open details, and look for “Market Depth” or “Order Book”.
- Xetra website: Enter the ETF’s ISIN or WKN, then click “Order book” to see live bids and asks.
What to look for:
- Bid prices and sizes (left): What buyers are offering, and how many shares
- Ask prices and sizes (right): What sellers want, and how many shares
- Spread: The difference between the best bid and ask
- Depth: How many shares are available close to the current price
Example: Suppose on Xetra, the order book for IE00B4L5Y983 (iShares Core MSCI World UCITS ETF) shows:
- Best bid: €49.95 for 3,500 shares
- Best ask: €49.97 for 2,000 shares
- Next bid: €49.94 for 1,000 shares
- Next ask: €49.99 for 1,000 shares
The spread is €0.02, or about 0.04%—very tight.
Why it matters: Tight spreads and deep order books mean you can trade larger amounts without moving the price.
What can go wrong: If you only see a few shares at the best prices, a large order may “walk the book” and end up filled at much worse prices. Always check the depth, not just the top line.
Pro Tip
If your broker doesn’t show live order books, use the official exchange site or ask your broker about enabling Level 2 data (sometimes for a small monthly fee).
Step 4: Check Recent Trading Volumes
What to do: Look at the ETF’s average daily trading volume on the exchange you’ll use. Platforms like Xetra, Euronext, and LSE display this data. On DEGIRO, it’s under “Statistics”; on Trade Republic, check “Key Figures”.
Example: On Xetra, IE00B4L5Y983 might show an average daily volume of 600,000 shares. That’s highly liquid. By contrast, a niche ETF might trade only a few thousand shares per day.
Why it matters: Higher volumes generally mean better liquidity and lower trading costs. But remember: ETF liquidity is not just about trading volume—market makers can create/redeem shares as needed, so even low-volume ETFs can be liquid if market makers are active.
What can go wrong: Relying only on volume can be misleading. Always check both volume and the order book/spread.
Step 5: Compare Quotes Across Exchanges
What to do: Use a tool like justETF or the ETF provider’s website to view prices and spreads for your ETF on multiple European exchanges. Make sure to compare the spread and trading hours for each venue.
Example: For the same ETF:
- Xetra: Bid €49.95 / Ask €49.97 (spread €0.02)
- Euronext Amsterdam: Bid €49.94 / Ask €49.99 (spread €0.05)
- LSE (EUR line): Bid €49.93 / Ask €49.98 (spread €0.05)
Choose the venue with the tightest spread and highest volume—if your broker allows.
Why it matters: Trading on the most liquid exchange can save you real money, especially for larger orders.
What can go wrong: Some brokers restrict which exchanges you can access. Don’t assume you’re getting the best deal—check!
Step 6: Place a Limit Order, Not a Market Order
What to do: Always use limit orders when buying or selling ETFs, especially if spreads are wide or volume is low. In your broker’s trading screen:
- Choose “Limit” order type
- Set your price (ideally at or just inside the best bid/ask)
- Specify quantity and review total cost
- Submit the order and wait for execution
For example, if the ask is €49.97, set your limit buy at €49.97 or €49.98. Do not use a market order unless the spread and depth are both excellent.
Why it matters: Limit orders protect you from “slippage”—getting filled at a worse price than expected.
What can go wrong: With a market order, you could pay far above the current price if the order book is thin or volatile. With a limit order, there’s a risk your order won’t fill if the market moves away.
Pro Tip
Time your trades during the most liquid hours (typically 9:05–17:30 CET for Xetra) to maximize your chance of a good fill.
Step 7: Review Execution Quality After Trading
What to do: After your trade executes, compare your fill price to:
- The ETF’s Net Asset Value (NAV) at the time (often shown on the provider’s site)
- The best bid/ask when you placed the order
Calculate your effective spread and total cost (including any broker commission).
Expected outcome: Your fill price should be at or very close to your limit price, and the total cost (spread + commission) should be less than 0.10% for the most liquid EUR ETFs.
Why it matters: Reviewing execution helps you identify if you’re overpaying due to bad liquidity, wide spreads, or poor broker routing.
What can go wrong: If your fills are consistently worse than expected, consider switching brokers or trading on a different exchange.
Top Liquid UCITS ETFs (EUR Examples)
- iShares Core MSCI World UCITS ETF (IE00B4L5Y983) – Xetra, Euronext, LSE
- Xtrackers MSCI Emerging Markets UCITS ETF (IE00BTJRMP35) – Xetra, Borsa Italiana
- Vanguard FTSE All-World UCITS ETF (IE00B3RBWM25) – Xetra, Euronext
- Lyxor MSCI World UCITS ETF (LU1781541179) – Euronext
- Amundi MSCI Europe UCITS ETF (LU1681042605) – Euronext, Xetra
These ETFs typically have tight spreads (≤0.05%) and deep order books during EU trading hours.
Common Mistakes
- Ignoring the exchange: Liquidity varies by venue—always check where you’re trading.
- Trading outside main hours: Spreads widen and volumes drop near open/close or during lunch hours.
- Using market orders in illiquid ETFs: This can result in significant overpayment.
- Confusing fund AUM with trading liquidity: A large ETF can still be illiquid on your chosen exchange.
- Not factoring in all costs: Commissions, spreads, and currency conversion (if not in EUR) all matter.
Next Steps
- Practice assessing liquidity for 2–3 ETFs on your broker and the exchange website
- Compare execution quality across venues, if possible
- Explore enabling Level 2 data for deeper order book analysis
- Stay updated on ETF trading hours and holiday calendars for your chosen exchange
Disclaimer: This article is for educational purposes only and does not constitute financial advice. Always do your own research and consider consulting a qualified financial advisor before making investment decisions.