«Money market = zero risk» is one of the most widespread beliefs among investors — and one of the most mistaken. Let’s take the best-known money-market ETF, Xeon, and look at it with real data: what it is, what it costs, and why it too can lose — slowly, for years.
- What it is: the most widely held money-market ETF — synthetic: it «becomes» the €STR overnight rate via a swap. Since 2007, over €20bn, 0.10% TER.
- True cost: the KID says 0.10% and measured tracking confirms ~10bp a year — declared = real, with rare consistency.
- Tax (Italy): effective rate currently around 15.5% — but a moving target: it depends on the swap collateral, swinging between 12.9% and 15.5% across the last 11 semesters.
- Risks: swap counterparty (mitigated by UCITS collateral rules) + the negative-rate erosion — nearly ten years below its peak, with recovery only in early 2024.
- Vs C3M: minimal cost and reactivity here; real ownership and stable taxation there — the measured comparison is in the C3M article.
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1. What a money-market ETF is (and what Xeon is)
A money-market ETF is a tool to «park» cash: it tracks a very short-term interest rate — the money-market rate. Xeon — Xtrackers II EUR Overnight Rate Swap UCITS ETF 1C (ISIN LU0290358497) — tracks €STR, the euro overnight rate (the cost of money «from tonight to tomorrow» in the euro area). It’s accumulating (it reinvests, it doesn’t pay coupons) and has been on the market since 2007.
2. How it earns — and why it can turn negative
Xeon tracks the Solactive €STR +8.5 bps index: in practice it earns the euro overnight rate plus 0.085% a year. When €STR is high — as from 2022 onward — it yields. But when €STR is low or even negative (as it was from 2015 to mid-2022, in the years the ECB held rates below zero), the gross yield is close to zero or negative. And after subtracting the fund’s cost (the TER), the value falls. That’s why «money market» doesn’t mean «can’t lose».
3. The numbers, from the official factsheet
| Item | Value |
|---|---|
| ISIN | LU0290358497 |
| Ticker (Borsa Italiana) | XEON |
| TER (annual cost) | 0.10% |
| Assets (AUM) | over €20 billion |
| Replication | Synthetic (swap) |
| Income | Accumulating |
| Index | Solactive €STR +8.5 bps |
| Launch | 2007 |
According to the official lists published by the brokers (downloaded and cross-checked by us), these share classes of the fund appear tradable with zero fees:
LU0290358497XEON- Directazero within the savings plan (buys)
- Directazero on single buys from 1,000 €, agreement until 31 December 2026
- Finecozero on buys (single orders and savings plan) — promo list renewed monthly: check it is still listed
- Moneyfarmzero within the savings plan (buys), agreement until 22 May 2027
- Moneyfarmzero on single buys from 1,000 €, agreement until 22 May 2027
- XTBzero (up to €100,000 monthly volume, unreachable for a retail plan); fractions available in plans
Official lists verified on 3 September 2026. We record published terms — this is neither an invitation to open accounts nor a recommendation: lists change, the broker’s documents prevail. Trade Republic, Scalable Capital and Trading 212 publish no per-ISIN lists and don’t appear here.
Two things matter most. First: the cost is low (0.10% a year) and the fund is huge (over €20 billion), so very liquid — which also keeps the bid-ask spread tight: buying and selling costs very little, and only once per trade, not every year — its impact on returns is negligible. Second, and this is the least visible risk: replication is synthetic. Xeon doesn’t actually buy the securities; it obtains the return through a swap with a bank. Upside: efficiency. Risk: if that counterparty doesn’t pay — so-called counterparty risk — there’s a danger (mitigated by collateral, but present). The difference between physical and synthetic replication — pros, cons and when it really matters — is covered in Physical or synthetic replication. Source for the fund data: Xtrackers factsheet, 29/05/2026.
4. The risk few people look at: years underwater
The theory is clear; the data is clearer. See it for yourself below: how far Xeon stayed below its previous peak over time. Pick a country and switch between nominal and the real (inflation-adjusted) return.
Method — source: daily market prices; Eurostat/ONS inflation and ECB FX rates for the real version · processing: nominal and real drawdowns per country computed by Rebalix · updates: automatic, daily.
In euros the nominal drop was modest (about −3.7%) but lasted nearly a decade. The real blow is the real one: after inflation, purchasing power fell by more than 25% and still hasn’t returned to par. And for someone thinking in another currency the exchange-rate effect can weigh far more — try Switzerland, for example.
5. Costs, tax and inflation: the real return
A money-market fund’s gross return is eaten by two things of a different nature. First, the product’s costs — TER (0.10%), tax and stamp duty: these are features of Xeon, and vary from ETF to ETF. Then inflation, which isn’t a cost of Xeon — it’s the same for any investment (more on that below). Let’s start with the product costs. Tax depends on where you’re tax-resident — check your local rules. In Italy, for example, ETF capital gains are taxed at 26%, with a reduced 12.5% on the share invested in «white-list» government bonds; for Xeon that currently works out at an effective rate of around 15.5% (the white-list share is updated every six months). Italy also levies a stamp duty of 0.2% a year on the holding’s value (not on the gain), which bites hard on a low-yield fund. When returns are small, these product costs — TER, tax and stamp duty — can already erode much of the gain on their own. Whatever figure your own broker or bank applies is what you’ll actually be charged — even if it differs — so it’s worth checking there too. Mind that the share moves — in H1 2023 it was above 97% (effective rate 12.9%), today it is much lower — so for a past sale the share of that semester applies, not today’s. Xeon’s tax page — share, effective rate, worked euro examples and the semester-by-semester history back to 2021 — lives in our white-list database, updated every semester.
Try it yourself, changing the values:
Method — source: the official DWS white-list share (our database) and Eurostat/ONS inflation · processing: net result after costs, tax and inflation with the reader’s own inputs · updates: white-list share semi-annual; inflation at the latest monthly reading.
Enter a low gross yield (as in the zero-rate years) and watch what happens: after costs, tax and inflation, the real return drops below zero. That’s where the «safe parking spot» quietly costs you purchasing power.
One important clarification, so there’s no misunderstanding: inflation is not a flaw of Xeon. It hits a savings account, another money-market fund, cash sitting in your account in exactly the same way — no liquidity-parking tool escapes it. The point isn’t «Xeon is worse than the others», but that no low-yield parking spot protects your purchasing power when rates are low and inflation isn’t. For the cash you need in the short term it’s perfectly fine: the problem only arises if you leave money there for years thinking it’s sheltered — and that’s a category mistake, not a fault of the instrument.
A money-market ETF is for parking cash; it isn’t a machine that can’t lose. At low rates, after costs, tax and inflation, the real return can be negative — and can stay so for years. «Low risk» doesn’t mean «no risk».
Frequently asked questions
What is inside XEON?
Not what you'd expect: XEON doesn't buy money-market instruments — it holds a COLLATERAL basket (hundreds of bonds, including long-dated and corporate) and swaps its return with a bank for €STR +8.5bp. That's synthetic replication: the return is the rate's, the ownership is something else.
Does XEON pay dividends?
No: it accumulates. The yield quietly compounds into the share price, day after day.
How much does XEON yield?
The euro overnight rate (€STR) plus 0.085% a year, minus the TER: it tracks ECB rates almost in real time. When rates were negative (2015-2022) it slowly lost, by construction.
What does XEON really cost?
The TER is 0.10% and — rare case — the measured cost confirms the declared one: the gap to its index is ~10bp a year, with multi-year consistency. The KID declares zero transaction costs, and the numbers agree.
Is XEON risky?
It is among the least volatile instruments there are, but «low risk» is not «no risk»: there is swap counterparty risk (mitigated by UCITS rules and collateral) and there is the negative-rate lesson — nearly ten years below its previous peak: from the June 2014 high, recovery only came in early 2024.
How is XEON taxed for an Italian investor?
At the effective rate of the semester in which you sell: today ~15.5%. And that is its quirk: it depends on the swap collateral, swinging between 12.87% and 15.46% across the last 11 semesters. The full history is in our tax page.
Does XEON trade at a discount or premium to NAV?
As a huge, highly liquid fund, its price typically sits within a few hundredths of a point of NAV; you still pay the bid-ask spread, minimal on this instrument.
Where does XEON trade?
On Borsa Italiana and Xetra under the ticker XEON. Some Italian brokers offer it commission-free: the up-to-date list is in the article's box.
What is the difference between XEON and C3M?
Same category, opposite philosophies: XEON is synthetic on the overnight rate (minimal cost, rate reactivity, moving tax rate), C3M buys real 0-6 month government bills (real ownership, lower and stable taxation). The measured comparison, charts included, is in the C3M article.