What should investors do after the biggest stock market plunge in history?

However, according to analysts, macro information is still good, investors should not panic, this is an opportunity to restructure portfolios for those who are calm enough and have cash available.

Mr. Nguyen The Minh, Director of Analysis of the Retail Client Division of Yuanta Securities Vietnam, commented that the market's plunge did not come from macro factors or business results, but mainly stemmed from a wave of widespread concern among investors, after the conclusion of the inspection of corporate bonds was announced at the end of last week. Many investors are concerned about whether the above situation will repeat the story of bonds in 2022, while the amount of margin (margin loan) in the market is quite high.

However, in reality, there was no new negative information big enough to explain such a sharp decline. Therefore, it can be said that yesterday's sharp decline was due to psychological influences, not fundamental factors.

Experts believe that the sharp decline in stocks in the October 20 trading session was only due to psychological factors and the market will soon recover. (Illustration photo)

Mr. Minh predicts that the market may continue to adjust in the next 1-2 sessions but will quickly rebalance. For investors using high margin, they should bring the ratio to a safe threshold, those using their own capital do not necessarily have to sell in this area because many stocks are at attractive valuations.

Sharing the same view, Mr. Tran Duc Anh - Director of Macroeconomics and Market Strategy of KB Securities Vietnam (KBSV) - explained that the psychology of individual investors is relatively fragile in this period, when the market has just experienced a relatively good increase in 6 months, causing selling pressure to always be present. Therefore, when information appears in the market, in this case the conclusion of the inspection of corporate bonds, the psychology of investors will fluctuate, causing selling pressure to appear.

Mr. Duc Anh recommends that during this period, investors need to calmly review the problem, see what is the cause of the market correction. Because according to him, domestic economic factors are quite positive, GDP growth is stable, a series of businesses received impressive business results in the third quarter.

“ A solid macro foundation is a factor that strengthens the long-term market outlook. The support level for the VN-Index in the near future could be 1,600 points ,” said Mr. Duc Anh.

Mr. Do Bao Ngoc - Deputy Director of Kien Thiet Securities also said that the sell-off in yesterday's session mainly came from investors' psychology, so the market will soon recover. He identified important support levels in the coming time around 1,560 - 1,600 points.

Mr. Vo Van Huy - Head of Senior Client Department, DNSE Securities, said that during this period, investors need to prioritize risk management, reduce margin and increase cash ratio, which helps increase the opportunity to buy good stocks when the market enters a new wave.

“ In the long term, I believe the market will continue to catch the uptrend, this is just a cleansing phase and will last longer than the previous correction phases. The resistance level of VN-Index can be referenced in the coming time, fluctuating between 1,500 and 1,600 points ,” he said.

Meanwhile, securities companies also expressed quite optimistic views about the stock market in the short term.

Dragon Viet Securities (VDSC) forecasts that the market will soon find a balance in the next few sessions and continue to reflect the prospects of corporate profits, similar to the periods of June and August. VN-Index may fluctuate in the range of 1,489 - 1,758 points in the coming time.

This is the time for investors to calmly observe, without needing to sell off. With a medium-term vision, this correction can open up buying opportunities at more attractive prices.

AIS Securities Company also advises short-term investors to prioritize capital preservation and reduce the proportion of stocks in their portfolios. Do not rush to buy during technical rebounds if any. " Be more cautious when catching the bottom ," AIS further recommends.

Asean Securities experts commented that the VN-Index formed a Bearish Marubozu candle on the daily chart. Trading volume reached more than 1.63 billion units, a sharp increase compared to the previous session and higher than the 20-session average, showing strong selling pressure in the short term. Currently, the VN-Index has returned to the accumulation base formed throughout September 2025.

" We believe that the correction momentum may continue at the beginning of the next session due to the psychological impact of today's sharp decline. However, the index will likely gradually balance with the support force around the current accumulation base.

Investors should only maintain holding positions with stocks that have safe capital values and are moving in a short-term uptrend.

Investors with a large cash position can look for corrective buying points in stocks that benefit from looser macro policies and positive third-quarter 2025 business results... ".

Vietnamese stocks experienced a historic decline on October 20, with the VN-Index falling 94.76 points (5.47%) to 1,636.43 points, and the HNX-Index falling 13.09 points (4.74%) to 263.02 points. The VN30 group also "evaporated" 106.28 points (2.23%) to 1,870.86 points.

HOANG DUNG

Source: https://vtcnews.vn/nha-dau-tu-nen-lam-gi-sau-phien-chung-khoan-lao-doc-manh-nhat-lich-su-ar972176.html