MBB Leads VND 589B Foreign Net Selling in Vietnamese Banks

Overview

Foreign investors net sold close to VND 589 billion of Vietnamese banking stocks in the final week of October, concentrated in MBBank (MBB), Vietcombank (VCB), Asia Commercial Bank (ACB), Sacombank (STB), VPBank (VPB) and SHB, according to Vietstock data. The selling landed as the VN-Index dropped more than 32.5 points for the week, with banks leading the negative contribution, while Kosy (KOS) hit its ceiling price at VND 4,060 on 30 October after 29 consecutive floor sessions.

Key Facts

• Foreign investors net sold nearly VND 589 billion across the banking sector last week, per Vietstock statistics.
• MBB, VCB, ACB, STB, VPB and SHB were the most heavily sold names in the group.
• Buying in TCB and TPB partially offset the outflows but did not reverse the sector’s net-sell position.
• The VN-Index fell more than 32.5 points in the last week of October, with banks the largest negative contributors.
• KOS closed at its ceiling price of VND 4,060 on 30 October, ending a run of 29 consecutive floor sessions dating from 21 September.
• MBB closed at VND 18,750 on 2 November; VCB at VND 53,600, ACB at VND 20,300 and STB at VND 65,100.
• Proprietary trading desks were also reported as net sellers during the week, per the same source.

What Happened

The article, a pre-market roundup published by Vietstock ahead of the 3 November session, reported that liquidity was subdued through the final trading week of October. Foreign investors sold MBB, VCB, ACB, STB, VPB and SHB heavily; after netting purchases in TCB and TPB, the banking group still recorded a net outflow of roughly VND 589 billion. The report attributes the figures to Vietstock’s own market statistics rather than to a single exchange filing.

The same roundup noted that proprietary trading accounts were also net sellers, adding a second source of supply alongside foreign flows. The VN-Index shed more than 32.5 points over the week, with the banking sector the largest drag on the index. Separately, KOS rose to its ceiling price of VND 4,060 on 30 October, ending 29 consecutive floor sessions that began on 21 September. The article also flagged November disclosure events, including the PMI release and the October 2026 socio-economic report, and noted that VSDC plans to bring a central counterparty (CCP) mechanism into operation for the underlying equity market in the first quarter of 2027.

Market Context

MBB trades on HOSE and closed at VND 18,750 on 2 November, with VCB at VND 53,600, ACB at VND 20,300 and STB at VND 65,100. The dispersion is wide: STB sits at a materially higher absolute price than MBB and ACB, reflecting differing share counts and book values rather than a uniform sector re-rating. The week’s foreign selling coincided with a broad index pullback, suggesting the outflows were part of a market-wide de-risking rather than an MBB-specific event. The article does not disclose the foreign-ownership ratio at MBB or the room remaining under the sector cap.

Strategic Significance

For long-term holders, the relevant question is whether this is cyclical flow noise or a change in the foreign base. Vietnamese banks have repeatedly cited the 30% foreign-ownership ceiling as a constraint on index inclusion and passive demand, and the article notes that removing ownership barriers is viewed as a precondition for market upgrading. A single week of VND 589 billion in net sales is small relative to the sector’s daily turnover, but it lands while proprietary desks are also selling, which removes two marginal buyers at once. If outflows persist through November, the pressure falls hardest on the most liquid, most foreign-owned names such as MBB and VCB, which are the easiest to sell.

What to Watch

• Weekly foreign net flow data for the banking sector through November, to see whether the VND 589 billion outflow extends.
• The November PMI release and the October 2026 socio-economic report cited in the article.
• VSDC’s CCP implementation timeline for the first quarter of 2027 and any update on foreign-ownership limits.
• Third-quarter earnings commentary from MBB and VCB on foreign-room capacity and shareholder structure.
• Whether KOS holds above its floor price after the 30 October ceiling session, as a read on speculative risk appetite.