VN30 vs VN Diamond ETFs: Comparing Flows, Performance and Tracking Error Risk in Vietnam's 2026–2027 Cycle

Vietnam's two most widely followed domestic equity ETFs have moved apart sharply during 2026. According to Yahoo Finance trading data as of 25/09/2026, the VFMVN30 ETF (E1VFVN30) closed the prior session at 34,600 VND, down 4.13% year-to-date, while the DCVFMVN Diamond ETF (FUEVFVND) closed at 33,720 VND, down 11.96% year-to-date. That 7.83 percentage-point gap in year-to-date returns — combined with a large difference in reported trading volume and structurally different index methodologies — makes the so sánh ETF VN30 và VN Diamond one of the most useful case studies for understanding tracking error risk in Vietnam's ETF market.

So sánh ETF VN30 và VN Diamond: Two Index Philosophies, Two Different Portfolios

Before comparing numbers, it helps to understand that these two products are not simply “large-cap ETF” versus “another large-cap ETF.” They track different index construction rules, and that difference — not fund management skill — is the root cause of most of the performance divergence described below. If you are new to the product wrapper itself, our guide to ETF là gì explains creation, redemption and NAV.

VN30 ETFs: concentrated large-cap exposure

The VN30 index family covers the largest and most liquid listed companies on the Ho Chi Minh Stock Exchange. In the data set used here, three VN30-tracking products appear: E1VFVN30 at 34,600 VND with 266K units traded, the SSIAM VN30 ETF (FUESSV30) at 24,540 VND with 3K units traded, and the KIM Growth VN30 ETF (FUEKIVFS) at 17,400 VND with 0K units reported in the same table.

The wide dispersion in unit prices across these three is not a performance signal. E1VFVN30, FUESSV30 and FUEKIVFS were launched at different times with different initial NAV per unit, so unit price levels are not directly comparable. Returns are comparable — and on that basis, E1VFVN30 is down 4.13% YTD while FUESSV30 is down 3.00% YTD and FUEKIVFS is up 1.99% YTD, according to the same 25/09/2026 data set.

What is a VN Diamond ETF? (ETF VN Diamond là gì)

A VN Diamond ETF tracks the VN Diamond index, a basket constructed around the theme of foreign ownership limits. The index methodology is designed to capture large-cap Vietnamese companies whose foreign ownership room is largely or fully used up — the logic being that when foreign capital cannot buy more of a stock regardless of demand, domestic supply and demand become the dominant price-setting force. In practice this produces a basket that overlaps only partially with the VN30, and can be concentrated in a relatively small number of names and sectors.

That construction choice has a direct consequence for anyone asking “ETF VN Diamond là gì” in a performance context: the product is not a substitute for a broad large-cap allocation, it is a targeted exposure with its own risk profile. In the current data set, FUEVFVND is the only pure VN Diamond product listed, priced at 33,720 VND with 181K units traded on the prior session.

Why the two baskets behave differently

Because the VN Diamond basket is filtered by an ownership criterion rather than by market capitalisation alone, its sector weights and individual stock weights can drift meaningfully away from the VN30 over time. When those differentiated weights are rewarded by the market, the VN Diamond product outperforms; when they are penalised, the gap opens in the other direction. The year-to-date figures show the second scenario dominating through 2026: a 7.83 percentage-point shortfall for FUEVFVND versus E1VFVN30.

The spread is not a one-off. It is the normal cost of running a differentiated basket, which is why this comparison deserves a review at every index rebalancing window rather than a single backward-looking glance. Our rolling ETF VN30 vs VN Diamond comparison tracks that gap month by month.

Trading Activity and “Fund Flows”: Reading the Numbers Correctly

Why volume is not the same as fund flow

This distinction matters more than any other in ETF reporting. True ETF fund flow is the change in shares outstanding multiplied by NAV — it reflects creation and redemption activity between authorised participants and the fund. Trading volume on the exchange is a completely different metric: it counts secondary-market turnover between buyers and sellers. A heavy trading day can pass with zero net creation, and a large creation can happen on a quiet session with almost no volume at all.

In the so sánh ETF VN30 và VN Diamond, that means E1VFVN30's 266K units and FUEVFVND's 181K units tell you about liquidity and market interest, not about whether money is entering or leaving either fund. Our explainer on dòng tiền ETF shows how to read creation and redemption data correctly.

What the 25/09/2026 data actually shows

Three observations stand out. First, E1VFVN30's 266K units of turnover dwarf FUEVFVND's 181K, which suggests the VN Diamond product is not the default large-cap vehicle for most domestic investors. Second, FUEKIVFS reports 0K units traded — a reminder that thin turnover is itself a risk, because wide bid-ask spreads quietly raise the effective cost of ownership. Third, YTD returns split in both directions among VN30 products, one positive and two negative, which is exactly why tracking error, and not headline price, should drive the comparison.

Tracking Error: The Real Cost Behind the 7.83-Point Gap

Most retail investors read only the return column. Professionals also read the difference between the fund's NAV return and the return of the index it is supposed to replicate. That difference is tracking error, and in any so sánh ETF VN30 và VN Diamond it explains a meaningful part of the final outcome.

Where tracking error comes from

Four sources dominate in the Vietnamese market: management fees and other operating costs, cash drag from dividends received but not yet reinvested, rebalancing frictions when index constituents change, and — most important for the VN Diamond structure — the premium or discount that appears when the underlying basket is hard to arbitrage. Because the VN Diamond index is built on foreign ownership limits, component stocks can be expensive to borrow or to buy in the size needed to create new units, which widens the premium/discount band and increases the gap between the exchange price and NAV. Our primer on tracking error là gì covers the formulas and benchmark conventions.

How to monitor it in practice

Track three things every month: (1) fund NAV return versus index total return over rolling 3, 6 and 12-month windows; (2) the premium or discount of the exchange price to the published iNAV; and (3) turnover, because liquidity is what keeps that premium or discount narrow. A product can post an excellent long-term return and still be a poor tracking vehicle if the premium swings widely between your entry and exit dates.

Using the So sánh ETF VN30 và VN Diamond in Portfolio Decisions

Once you accept that these two products answer different questions, the allocation decision becomes clearer.

The case for VN Diamond exposure

If you believe companies with exhausted foreign ownership room will keep re-rating as domestic capital absorbs supply, the VN Diamond structure gives you that exposure in a single line. Be aware of the trade-offs: heavier concentration, sector drift away from the benchmark, and a wider tracking error band that can work for or against you.

The case for VN30 exposure

If you want market beta rather than a structural bet, a VN30 product such as E1VFVN30 offers deeper liquidity, tighter spreads and a portfolio that behaves much closer to the headline index. It is the more natural core holding for disciplined dollar-cost averaging, with the caveat that the VN30 is itself a concentrated 30-stock basket. Broader context on the market backdrop sits in our Vietnam stock market 2026 review.

Key Takeaways for Vietnam's 2026–2027 Cycle

• On 25/09/2026, E1VFVN30 traded at 34,600 VND (-4.13% YTD) against FUEVFVND at 33,720 VND (-11.96% YTD) — a 7.83 percentage-point gap driven by index construction, not by manager skill.
• Unit price differences between VN30 ETFs reflect different initial NAV per unit at launch, not performance.
• Trading volume is not fund flow. Use creation and redemption data to measure flows, and use volume only to judge liquidity and spread risk.
• Tracking error — NAV return versus index return, plus the premium or discount to iNAV — is the metric that decides whether an ETF actually delivers what it promises.
• The so sánh ETF VN30 và VN Diamond is not a question of “which is better”, but of which risk profile you can hold through a full 2026–2027 cycle.

Data referenced in this article is sourced from Yahoo Finance as of 25/09/2026 and is provided for information and comparison purposes only. It is not investment advice, and prices, returns and trading volumes change continuously.