Hong Kong Stock Market: Hang Seng Index Recovers From Intraday Losses, Extends Gains for 3rd Day, What Gave It a Boost?

The Hang Seng index ended a volatile Asian session on a better note than its neighbours. Hong Kong and mainland Chinese indexes pared steep early losses, while South Korea, Japan and Taiwan stayed lower as technology shares were sold.

This article explains what hit Asian markets, why the Hang Seng index held up better, which levels matter next and what could move it from here. Where a number could not be verified, I say so.

The key point for readers is that Hong Kong and the tech-heavy markets of North Asia reacted to the same news in different ways. Korea and Taiwan are deeply tied to chip makers, so a threat to chip pricing hit them harder.

Click Here – Get Free Investment Predictions

Hang Seng Index and Asian Markets on 13 October 2026

Asian markets were mixed on Tuesday. The table uses early or intraday figures from market reports, apart from the Samsung and SK Hynix closes, so final numbers may differ.

Market	Move	Note
Hang Seng index	Down about 1% early, then recovered	Third day of gains per the headline; close not verified
Shanghai Composite	Down about 1% early, near 3,760	Recovered later per the headline
KOSPI (South Korea)	Down as much as 7.4% to 5,914.35	Lowest since late July; sidecar triggered
Nikkei 225 (Japan)	Down about 2.5% to about 67,300	First session after Sports Day holiday
Taiex (Taiwan)	Down about 2.5%	TSMC down about 2%

In Seoul, Samsung Electronics closed down 7.39% at 232,000 won and SK Hynix fell 10.09% to 1.443 million won. In Tokyo, SoftBank Group fell more than 8%, Kioxia about 8.8% and Advantest about 7%, according to one report.

Data note: Reports differ on the size of the KOSPI fall (over 5% in one, 7% or 7.4% in others) because they were written at different times. The figures above are intraday readings.

Track global market cues on the Univest Screener

What Hit Asia: Chinese Chipmakers and the Tech Sell-Off

The trigger was a report that ChangXin Memory Technologies (CXMT), China's largest DRAM maker, has made progress on a next-generation 4F² memory-cell design. The company plans server memory modules using the structure by year-end. That raised fears for Samsung and SK Hynix, which earn very high margins from memory.

Driver	Detail
Chinese chipmakers	CXMT progress on 4F² design and DDR5 server memory plans
Nvidia China sales	IDC: 678,000 AI accelerators shipped to China in Jan to Jun, down 44% year on year
US tech	US tech stocks fell on Columbus Day; Nvidia, Micron and SanDisk were under pressure
Macro	Brent near $105 a barrel; US 10-year yield near 5.2%
Weaker buying	Samsung buyback finished; SK Hynix programme nearly complete

One report notes that CXMT is not yet taking large-scale high-end share from Samsung or SK Hynix. The worry is about future pricing power, because more Chinese supply could erode the scarcity premium behind today's memory margins.

Risk: A tech sell-off can spread quickly. The Hang Seng index recovered, but the recovery has not been tested by a fresh fall in US chip shares.

Why the Hang Seng Index Recovered: AI Valuations Versus Hong Kong Mix

Investors are asking who keeps the large AI-related profits if Chinese competition grows and expensive capital makes high valuations harder to defend. A strategist quoted by the Financial Times pointed to the boom and bust history of chipmakers. Yet demand for AI computing has not suddenly collapsed, according to one report.

The Hang Seng index has a different mix from the KOSPI or Taiex. It holds banks, insurers, internet platforms and consumer names, so it is less tied to memory chip prices. That is a likely reason the Hang Seng index recovered, though I did not find a source that gives the exact stocks behind the rebound.

Level	Hang Seng index	Distance from 24,271.2 (12 Oct close)
Resistance	24,642 (28 Sep close)	About 1.5% higher (my calculation)
12 Oct close	24,271.2	Reference
Support	24,000 (round number)	About 1.1% lower (my calculation)
Support	23,857 (early 5 Oct low)	About 1.7% lower (my calculation)

On 12 October the Hang Seng index closed at 24,271.2, up 0.25%, while the Hang Seng Tech Index fell 0.67% to 4,169.57 and turnover was HK$162.632 billion. The resistance and support levels come from an earlier Univest market note dated 6 October, so they are reference points, not forecasts.

Download the Univest iOS App or Univest Android App to get market alerts and track global cues.

What Could Move the Hang Seng Index Next

China and US September inflation data are due on Wednesday. A hot US reading could lift yields further, and the US 10-year yield is already near 5.2% in one report. Oil near $105 adds to the pressure.

Event	Why it matters
China September CPI (Wednesday)	Signals domestic demand and policy room
US September CPI (Wednesday)	Drives rate and yield expectations
US chip stock moves	Direct driver of Asian tech sentiment
CXMT follow-up news	Tests the Chinese chipmakers story
Hang Seng Tech Index	It fell on 12 October while the main index rose

Risk: Global events can reverse a gain in a day. The Hang Seng index extending gains for three days does not mean the move will continue.

What to Watch Next for the Hang Seng Index

1. Hang Seng index close against the 24,642 resistance and 24,000 support
2. Whether the Hang Seng Tech Index joins the recovery
3. KOSPI and Taiex reaction at the next open after the tech sell-off
4. China and US September CPI prints on Wednesday
5. More news on CXMT and Chinese chipmakers

Conclusion

The Hang Seng index showed resilience by recovering from steep intraday losses and extending gains for a third day, even as the tech sell-off hit Korea, Japan and Taiwan. The causes were Chinese chipmaker competition and AI valuations, and the next test is Wednesday's inflation data and US chip shares.

Frequently Asked Questions

Why did the Hang Seng index recover from intraday losses?

Ans. The Hang Seng index has a mix of banks, insurers and internet stocks, so it is less tied to memory chips. I did not find a source naming the exact stocks behind the rebound.

What caused the tech sell-off in Asia on 13 October 2026?

Ans. Reports that ChangXin Memory Technologies advanced a 4F² memory design raised fears about Samsung and SK Hynix, and weak US tech shares added to the tech sell-off.

How much did the KOSPI fall?

Ans. The KOSPI fell as much as 7.4% to 5,914.35 intraday, its lowest since late July, and a five-minute sidecar was triggered.

What did Samsung and SK Hynix do?

Ans. Samsung Electronics closed down 7.39% at 232,000 won and SK Hynix fell 10.09% to 1.443 million won, according to Korea JoongAng Daily.

What was the Hang Seng index close on 12 October 2026?

Ans. The Hang Seng index closed at 24,271.2, up 0.25%, and the Hang Seng Tech Index fell 0.67% to 4,169.57.

Are Chinese chipmakers a threat to Samsung and SK Hynix?

Ans. One report says CXMT is not yet taking large-scale high-end share. The worry is future pricing power if Chinese supply grows.

What are the AI valuations concerns?

Ans. Investors question who keeps AI-linked profits if competition rises and costly capital makes high valuations hard to justify, while AI demand itself has not collapsed.

What should investors watch next?

Ans. Watch China and US September CPI on Wednesday, US chip shares and the Hang Seng index against 24,642 and 24,000. This is not investment advice.