Tracking Error ETF Việt Nam: Why Real NAV Diverges from VN30 and VN Diamond
Two Vietnamese ETFs that both target the VN30 index posted clearly different returns in the latest available data — E1VFVN30 at -4.71% year-to-date and FUESSV30 at -5.81% — while FUEVFVND, which tracks the VN Diamond index, sits at -13.86% YTD. That dispersion is precisely what tracking error ETF Việt Nam analysis is designed to explain. Below we break down where tracking error comes from in the Vietnamese market, how it shows up in the most recent pricing data, and how investors can measure tracking error ETF Việt Nam themselves.
All figures below are based on Yahoo Finance data as of 01/10/2026. The market had not yet opened at the time of collection, so the prices shown are the prior session's closing prices and the volumes are the last reported trading volumes — not live intraday quotes.
What Tracking Error ETF Việt Nam Actually Measures
Tracking error ETF Việt Nam is often used loosely. In practice, it describes two separate gaps, and confusing them is the single most common mistake investors make when comparing Vietnamese ETFs.
Gap 1: Index return versus fund NAV return
This is the classic definition. A fund like E1VFVN30 or FUESSV30 is built to replicate the VN30 index. Over any period, the fund's net asset value per unit will drift away from the index return because of management fees, cash holdings, dividend timing, and the cost of rebalancing when the index changes composition. This gap is structural and persistent — it does not disappear when markets calm down, and it is the portion of tracking error ETF Việt Nam that no trading strategy can arbitrage away.
Gap 2: NAV versus the exchange-traded price
The second gap is the difference between what the fund's underlying basket is worth and what the ETF actually trades at on the exchange. This gap is temporary, driven by supply and demand, and by whether authorised participants can efficiently create or redeem units — see our explainer on NAV versus market price for ETFs. In thin markets it can be wide; in deep markets it is usually small. When you see two VN30-tracking funds move very differently on the same day, you are almost always looking at Gap 2, not Gap 1.
Why the market-price gap matters more in Vietnam
Vietnam's ETF market has a handful of large, liquid products and a long tail of very small ones. A fund with heavy daily turnover has an efficient creation/redemption channel that keeps price close to NAV. A fund trading a few thousand units a day does not, and its quoted price can move several percent on negligible volume — the mechanics are covered in our guide to ETF liquidity in Vietnam. As the latest data shows, that is not a theoretical concern.
Tracking Error ETF Việt Nam in Practice: Same Index, Different Results
The table below reproduces the full dataset used in this article, exactly as reported.
| Ticker | Name | Price | 1-Day | 1-Wk | 1-Mo | YTD | Volume |
|---|---|---|---|---|---|---|---|
| E1VFVN30 | VFMVN30 ETF | 34,220 VND | -0.26% | -2.30% | -3.59% | -4.71% | 417K units |
| FUEVFVND | DCVFMVN Diamond ETF | 32,990 VND | -0.45% | -1.70% | -2.97% | -13.86% | 1,380K units |
| FUESSV30 | SSIAM VN30 ETF | 23,830 VND | -2.34% | -3.25% | -3.05% | -5.81% | 10K units |
| FUESSV50 | SSIAM VNX50 ETF | 28,000 VND | -1.91% | -3.29% | -3.62% | -0.63% | 10K units |
| FUESSVFL | SSIAM VN FINLEAD ETF | 28,330 VND | -0.52% | -0.49% | -3.48% | -5.90% | 4K units |
| FUEKIVFS | KIM Growth VN30 ETF | 15,160 VND | -6.54% | -11.71% | -13.37% | -11.14% | 0K units |
| VNM | VanEck Vietnam ETF | $16.86 | -0.56% | -2.06% | -6.93% | -11.80% | 638K shs |
Source: Yahoo Finance, 01/10/2026. Returns are price returns and exclude dividends.
The VN30 group: three funds, three different daily moves
E1VFVN30 and FUESSV30 both track the VN30, yet their one-day moves of -0.26% and -2.34% are far wider apart than any fee difference could justify. FUEKIVFS, a third VN30 tracker, fell 6.54% the same day on essentially zero reported volume. When a fund trades 10K units or fewer a day, its closing price is set by the last marginal trade rather than by the value of the basket — that is Gap 2 in its purest form, and it is the single most common source of misleading tracking error ETF Việt Nam figures. A side-by-side breakdown is in our E1VFVN30 vs FUEVFVND comparison.
Fees, Cash Drag and Rebalancing: The Structural Drivers of Tracking Error
Once you strip out the temporary price-versus-NAV gap, what remains is Gap 1 — the persistent drag that separates a fund's NAV return from its index. In the Vietnamese market, four drivers recur.
- Management and custody fees — usually the largest single contributor, and the most predictable. Our breakdown of ETF fees in Vietnam shows how a 0.5–1.0% annual fee maps directly onto tracking error.
- Cash drag — funds hold a cash buffer to meet redemptions, and that buffer earns nothing close to the index return.
- Dividend timing — Vietnamese dividend season is concentrated, so funds that hold cash between receipt and reinvestment lag a total-return index even when they hold identical stocks.
- Rebalancing costs — index reconstitutions force turnover, and the associated brokerage, tax and market-impact costs land on the fund, not the index.
How to Measure Tracking Error ETF Việt Nam Yourself
You do not need a Bloomberg terminal. Five steps are enough.
- Collect the fund's daily NAV per unit from the fund's own website (not the exchange price).
- Collect the total-return series of the underlying index — VN30 or VN Diamond — for the same dates.
- Compute the daily difference between the two return series.
- Take the standard deviation of those daily differences and annualise it by multiplying by the square root of 252.
- Compare the result with the fund's stated expense ratio: the excess is the part of tracking error ETF Việt Nam worth questioning.
Note the distinction: a fund can have low tracking error versus its index and still show a wide gap versus its exchange-traded price. The two numbers answer different questions, which is why a single headline 'tracking error' figure rarely tells the whole story.
Liquidity, Creation and Redemption: Why the Gap Widens
Liquidity determines how quickly deviations are arbitraged away. Deep secondary-market volume gives market makers an incentive to create and redeem units, which pulls the exchange price back toward NAV. Thin volume removes that incentive, and the price can stay detached for days. Before comparing returns across these products, it helps to understand how to buy ETFs in Vietnam and why order-book depth, not the fund name, drives execution quality.
FAQ: Tracking Error ETF Việt Nam
Is tracking error the same as the price difference between two ETFs?
No. Standard tracking error compares a fund's NAV return with its benchmark index return. The difference between two ETFs' market prices on a given day is usually a liquidity and premium/discount effect, not tracking error.
Which Vietnamese ETF has the lowest tracking error?
Broadly, the funds with the largest assets and heaviest daily turnover — E1VFVN30 and FUEVFVND — show the tightest price-to-NAV relationship, because their creation/redemption channels function most efficiently.
Does tracking error ETF Việt Nam data include dividends?
Only if you use a total-return index. Comparing a fund's NAV return with a price-only index overstates the gap during dividend season, which is exactly the error most commonly made when analysing Vietnamese ETFs.
What This Means for Investors
Tracking error ETF Việt Nam is not one number. Split it into the structural drag versus the index (fees, cash, dividends, rebalancing) and the temporary gap between NAV and the traded price (liquidity, creation/redemption). The first is a cost you can compare and budget for. The second is a trading risk you manage by using limit orders and avoiding illiquid products. The latest data — two VN30 trackers four percentage points apart year-to-date — is a reminder that in Vietnam, product selection matters as much as index selection.