Of which, the trading session on June 13 had the largest trading volume of the month with 264,579 contracts.
Meanwhile, the volume of open contracts (OI) increased by 9.29% compared to the previous month. At the last trading session of the month, OI reached 48,447 contracts, of which the highest OI of the month reached 54,982 contracts at the trading session on June 11.
According to investor structure, derivatives trading by securities companies decreased, accounting for 1.66% of the total market, compared to 2.16% in May 2025.
The trading proportion of foreign investors also decreased by nearly half, with trading volume accounting for 1.86% of the total trading volume of the whole market.

Summary of VN30 index futures trading
TT | Target | Unit | May 2025 | June 2025 | Increase / decrease |
1 | Total transaction volume | contract | 3,698,080 | 3,615,759 | -2.23% |
2 | Average trading volume per session | contract | 184,904 | 172,179 | - 6.88 % |
3 | Average daily trading value (nominal) | billion dong | 25,605 | 24,516 | -4 , 25% |
4 | OI volume (end of period) | contract | 44,328 | 48,447 | 9 , 29% |
5 | Foreign investor transaction proportion | % | 3.64 | 1.86 | 48.90% |
6 | Proprietary trading ratio | % | 2.16 | 1.66 | -23.15% |
In the second quarter of 2025, the total trading volume of VN30 index futures contracts reached 12,593,727 contracts, an increase of 24.29% compared to the first quarter of 2025; and the total trading value reached VND 1,700 trillion, an increase of 24.53%.
Source: https://nhandan.vn/thi-truong-chung-khoan-phai-sinh-tren-hnx-thang-62025-khoi-luong-giao-dich-giam-688-post892929.html
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