SSI: Quant Trading Hits 50% of Foreign Institutional Volume in Vietnam

Overview

Quantitative trading accounts for roughly 6.6% of total trading volume on Vietnam’s stock market, yet contributes about 50% of foreign institutional client volume at SSI Securities (HOSE: SSI), according to Thomas Nguyen, the broker’s Head of Foreign Markets. The disclosure, made at a September 17 seminar on FDI listing pathways, frames quant funds as a small but fast-growing force in a market still dominated by retail investors.

Key Facts

• Quant trading represents approximately 6.6% of total trading volume on Vietnam’s stock market, per SSI data presented on September 17.
• Quant funds account for roughly 50% of foreign institutional client volume at SSI, a gap the firm describes as significant growth headroom.
• Thomas Nguyen, Head of Foreign Markets at SSI, estimated that about 60% of trading in the US market involves quantitative strategies.
• Foreign trading share of the Vietnamese market rose from 7.4% in 2021 to 13.2% in the first seven months of 2026, according to SSI data.
• Institutional clients currently account for about 30% of activity at SSI, based on the portion of the presentation disclosed.
• SSI shares closed at VND 21,150 on September 17, 2026.
• The remarks were delivered at the seminar “Lộ trình Niêm yết cho Doanh nghiệp FDI tại Việt Nam” in Hồ Chí Minh City.

What Happened

Speaking at a seminar on listing pathways for foreign-invested enterprises, Thomas Nguyen, Director of Foreign Markets at Chứng khoán SSI, devoted part of his presentation to the shifting investor structure of Vietnam’s equity market. He identified quantitative trading as one of the clearest markers of that transition. SSI’s data shows quant strategies at just 6.6% of total market volume, but at roughly half of the foreign institutional flow the brokerage handles.

Nguyen contrasted this with developed markets, estimating that around 60% of US trading now involves quant strategies. He argued the upward trend in Vietnam is difficult to reverse as the market institutionalizes. On market impact, he said quant funds can provide liquidity and dampen volatility during periods of cautious sentiment, particularly through market-neutral or mean-reversion strategies that trade against short-term moves in a market with a high retail share.

Market Context

SSI is listed on the Hồ Chí Minh Stock Exchange (HOSE) and closed at VND 21,150 on September 17, 2026, the date of the seminar. The securities sector’s earnings and valuation narrative is tied closely to market turnover, foreign participation and the pace of institutional account openings. SSI’s disclosure that foreign trading has grown from 7.4% of market activity in 2021 to 13.2% in the first seven months of 2026 places the quant commentary within a broader, multi-year shift toward institutional flows rather than a single-quarter event.

Strategic Significance

For SSI, the strategic point is mix rather than headline volume. If quant funds already generate half of foreign institutional flow at the firm while representing only 6.6% of the wider market, SSI’s derivatives, prime brokerage and execution infrastructure sit closer to the fastest-growing client segment than peers with weaker foreign coverage. The institutionalization thesis also supports fee stability: quant clients trade frequently and are less sensitive to retail sentiment swings. The main constraint is market structure — data quality, short-selling and hedging tools, and settlement mechanics — which determines how quickly the 6.6% converges toward developed-market levels.

What to Watch

• Monthly HOSE and HNX trading volume and foreign net flow data for evidence of rising institutional share.
• SSI’s quarterly earnings, particularly brokerage and institutional client revenue disclosures.
• Progress on market infrastructure upgrades, including the KRX system rollout and any short-selling or hedging rule changes.
• Foreign ownership and fund-flow filings from quant and ETF managers active in Vietnam.
• Any FTSE Russell or MSCI market classification updates that could accelerate foreign institutional participation.