E1VFVN30 vs FUEVFVND: VN30 vs VN Diamond Strategy, Fund Flows and Tracking Error Risk

All price and volume figures in this article come from Yahoo Finance data as of the prior session close on 18/09/2026. No other figures are used, and none are extrapolated.

So sánh ETF VN30 và VN Diamond — bài viết dùng đúng bộ dữ liệu trên để đối chiếu cấu trúc chỉ số, thanh khoản và rủi ro tracking error của E1VFVN30 và FUEVFVND.

At that close, E1VFVN30 (VFMVN30 ETF) was quoted at 35,500 VND per unit, up 0.42% on the day and 5.03% over one month, while FUEVFVND (DCVFMVN Diamond ETF) stood at 34,200 VND, up 0.29% on the day and 3.17% over one month. The two funds track different indices, and the divergence is far wider year-to-date: E1VFVN30 is down 1.63% YTD, while FUEVFVND is down 10.70% — a gap of roughly nine percentage points. This article compares the pair on index design, trading activity and tracking error risk, and explains why the trading volumes in the data table are not the same thing as ETF fund flows.

1. Two different index engines behind two similar-looking ETFs

VN30: the large-cap, liquidity-led benchmark

E1VFVN30 tracks a VN30 index family built from the 30 largest and most liquid stocks listed on the Ho Chi Minh Stock Exchange, with weight caps designed to limit single-stock concentration. The construction rule is essentially size and tradability: if a company is large enough and trades heavily enough, it qualifies. That delivers broad exposure to the blue-chip segment of the Vietnamese market, and it means the portfolio changes mainly when periodic index reviews reshape the constituent list.

VN Diamond: a foreign-ownership-constrained universe

FUEVFVND tracks the VN Diamond index, which is built around a different idea. Rather than simply taking the largest companies, the index focuses on listed companies whose foreign ownership room is limited or effectively exhausted. When offshore investors cannot easily buy those shares directly, the shares can trade at a scarcity premium, and a domestic ETF that holds them becomes an access route to that exposure. The result is a narrower, more concentrated and more thematic portfolio than VN30, with a return profile that can diverge sharply from the blue-chip benchmark — as the year-to-date figures show.

2. Performance and trading snapshot as of 18/09/2026

The data table

Reading the one-month versus year-to-date divergence

On a one-week horizon, FUEVFVND's +2.03% is marginally ahead of E1VFVN30's +1.87%. On a one-month horizon the ranking flips: E1VFVN30 is +5.03% against +3.17% for FUEVFVND. The year-to-date column shows the widest gap of all: -1.63% for E1VFVN30 versus -10.70% for FUEVFVND. The dataset does not identify which constituents or sectors produced that spread, so the defensible conclusion is structural: two different index designs can produce two very different return paths even when both products are quoted as Vietnamese equity ETFs.

3. Why ETF trading volume is not the same as fund flows

The Volume column above measures units changing hands on the exchange. ETF fund flows — dòng tiền vào hoặc ra khỏi quỹ — are a different number entirely: they come from creations and redemptions, which change the number of units outstanding and therefore the fund's total assets. Dòng tiền ETF can be positive on a day when exchange volume is heavy, negative on a day when volume is light, or close to zero on a day when the tape looks busy.

The table illustrates the point. FUESSVFL printed 1,333K units of volume, the largest figure in the set, but volume alone says nothing about whether the fund took in or paid out money. FUEKIVFS shows "0K units", which means no trading was reported in the session; it does not mean the fund was liquidated or that it received no money. And FUEVFVND's 167K units is simply a smaller secondary-market footprint than E1VFVN30's 621K units — a liquidity observation, not a flow observation.

To measure flows, you need units outstanding at the start and end of a period multiplied by net asset value. Because this dataset only carries market prices and exchange volume, no flow figure can be derived from it, and any article that treats volume as flows is making an unsupported claim.

4. Tracking error risk: where the two designs separate

Tracking error is the volatility of the difference between an ETF's return and its index return. It is not the same as the premium or discount to NAV on any single day; it is the consistency of the replication over time. Every ETF carries some of it, because of management fees, cash drag, dividend timing and the cost of rebalancing.

The two funds here do not face the same replication problem. A VN30 portfolio is built from the most liquid names on the exchange, so a manager can generally buy and sell the basket close to index weights at modest cost. A VN Diamond portfolio is by construction made of names where foreign room is scarce, and that can mean thinner free float available to a domestic fund, wider bid-ask spreads, and larger price swings when the index is rebalanced. The wider the gap between the price a fund pays and the price the index assumes, the larger the tracking error tends to be.

The practical consequence is a second, less obvious risk: premium and discount. When the underlying basket is hard to trade, the ETF's market price can drift away from its NAV, so a buyer paying 34,200 VND may be paying more or less than the value of the shares behind the unit. None of that can be verified from the table above, because the table contains no NAV series — tracking error has to be computed from fund NAV against index return, and anyone quoting a tracking error figure without that data is guessing.

5. So sánh ETF VN30 và VN Diamond: what the gap means for investors

• Index logic first. So sánh ETF VN30 và VN Diamond nên bắt đầu từ logic chỉ số: E1VFVN30 là broad blue-chip exposure, còn FUEVFVND là câu chuyện khan hiếm room ngoại. The -1.63% versus -10.70% YTD gap is most plausibly a story about which style the market rewarded, not about one manager being better than the other.
• Liquidity is not flow. E1VFVN30 traded about 3.7x the volume of FUEVFVND in the session shown; that describes how easily units change hands, not how much money entered either fund.
• Tracking error is not visible in price data. Any claim about replication quality requires NAV versus index returns, which this dataset does not contain.
• Concentration cuts both ways. A narrower universe can deliver sharper outperformance and sharper drawdowns, so position sizing matters more than the headline one-month return.

When you so sánh ETF VN30 và VN Diamond, the honest summary from this data is limited and specific: over the periods shown, the blue-chip fund has been the steadier of the two, one-week performance briefly favoured the Diamond fund, and the year-to-date spread is wide. Everything beyond that — flows, replication quality, premium risk — needs data this table does not carry.

Kết luận

So sánh ETF VN30 và VN Diamond bằng bộ số liệu 18/09/2026 cho thấy hai quỹ không thực sự cạnh tranh trên cùng một sân chơi: một bên là chỉ số vốn hóa lớn thanh khoản cao, một bên là rổ cổ phiếu bị giới hạn room ngoại. Nhà đầu tư nên đọc bảng giá và khối lượng như dữ liệu thanh khoản, không phải dữ liệu dòng tiền, và nên xem tracking error là chỉ số riêng cần tính từ NAV so với chỉ số tham chiếu.

Đọc thêm: E1VFVN30 là gì và FUEVFVND là gì để nắm cấu trúc danh mục trước khi so sánh hiệu suất.