What is the VN30?
The VN30 is a benchmark index of 30 large, highly liquid stocks listed on the Ho Chi Minh City Stock Exchange (HOSE). It is the index most professional investors use to describe Vietnam’s large-cap segment, and it is the underlying for VN30 futures traded on the Hanoi Stock Exchange (HNX). Where the VN-Index covers every stock on HOSE, the VN30 covers only the 30 that meet size, free-float and liquidity screens, so it tracks the part of the market that funds and foreign investors can actually trade in size.
How the index is built
HOSE publishes the VN30 methodology in its index factsheets and rules. The main features are:
- Universe. Constituents are drawn from the VNAllshare universe of HOSE-listed stocks.
- Screening. Candidates must pass eligibility, free-float and liquidity tests before ranking. The exact thresholds are in HOSE’s index rules and can be revised, so consult the current rulebook rather than this summary.
- Weighting. The index is market-capitalisation weighted and adjusted for free float, meaning only shares that are freely tradable count toward a company’s weight.
- Weight cap. A 10% cap limits the weight of any single stock in the VN30. HOSE does not apply the same cap to its VNAllshare sector indices.
- Reviews. The constituent list is reviewed twice a year, in January and July, so stocks can enter and leave as size and liquidity change.
Two features follow from this design. First, banks and a few large conglomerates tend to carry a high share of the weight because they are large and heavily traded, so the VN30 is more concentrated than the headline “30 stocks” suggests. Second, free-float adjustment means a company with a large state or founder stake counts for less in the index than its full market capitalisation implies.
VN30 versus VN-Index and VN100
| Index | Coverage | Typical use |
|---|---|---|
| VN-Index | All stocks on HOSE | Headline market level and 2025 return |
| VN30 | 30 largest, most liquid HOSE stocks | Large-cap benchmark; futures underlying |
| VN100 | VN30 plus the next 70 names | Broader large and mid-cap benchmark |
The VN30 usually moves with the VN-Index, because large caps drive the broader index, but the two can diverge when mid and small caps move on their own. The VN-Index vs VN30 comparison sets out the differences in detail.
Why the VN30 matters
- Benchmarking. Fund managers and analysts measure large-cap performance against the VN30.
- Derivatives. VN30 futures on HNX let investors hedge or take exposure to the large-cap segment without trading all 30 shares. It is the main index derivative in the Vietnamese market.
- Products. Exchange-traded funds and structured products reference the VN30, so changes to the constituent list can move money. Index reviews are watched closely because added stocks tend to see demand from tracking funds and removed stocks the reverse.
- Foreign investors. Foreign funds focus on stocks with enough liquidity and free float to build a position, which is closely what the VN30 screens select. The FTSE Russell upgrade to secondary emerging-market status, effective 21 September 2026, adds a second index that foreign passive funds track. See the stock market overview and the market report for the schedule.
Reading VN30 data
Look at the constituent list and weights on the day of a review, not from memory, because membership changes. Pay attention to concentration (how much comes from the top five names), to sector mix (banking, real estate, consumer and industrials dominate), and to how much of each company’s capital is counted after the free-float adjustment. Our Vietnam stocks tracker shows daily price data for a set of large caps.
Limits of this overview
Methodology details, thresholds and review dates are set by HOSE and can change. This summary reflects HOSE’s published index factsheets for recent years rather than a specific rulebook edition. Check HOSE’s current index rules for exact criteria.
Sources
- HOSE index factsheets (via Vietstock), including the VN30 methodology
- Ho Chi Minh City Stock Exchange (HOSE): index rules and constituent list
- Hanoi Stock Exchange (HNX): derivatives on VN30
This article is for reference only and does not constitute investment advice.