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Asia stocks surge, yen in the spotlight after suspected intervention - Finance news and analysis from Global Banking & Finance Review
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Asia stocks surge, yen in the spotlight after suspected intervention

Published by Global Banking & Finance Review

Posted on July 31, 2026

4 min read

· Last updated: July 31, 2026

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Asia stocks surge, yen steals spotlight after suspected intervention

Asian Markets Rally Amid Currency Intervention and Global Volatility

By Rae Wee

SINGAPORE, July 31 (Reuters) - Asian markets rallied hard with Wall Street on Friday as South Korea's battered market made a record comeback, stirring hopes that the recent selloff in AI-linked assets may be near an end.

The yen was also firmly in the spotlight, holding some distance away from a 40-year trough after suspected coordinated intervention from various authorities, which came ahead of the Bank of Japan's (BOJ) rate decision later in the day.

Long-end U.S. Treasury yields held near 19-year highs while short-end yields eased, steepening the curve as doubts grow over the Federal Reserve's ability to anchor inflation expectations. [US/]

South Korea and Japan Lead the Comeback

South Korea's Kospi leapt more than 10% on Friday, reversing steep losses from earlier in the week. Japan's Nikkei similarly advanced 4.5% and MSCI's broadest index of Asia-Pacific shares outside Japan rose 4.6%.

That followed surges in AI heavyweights Microsoft and Amazon overnight, lifting chip stocks broadly after upbeat earnings and forecasts from the pair eased concerns over hefty capital spending.

AI Sentiment and Market Recovery

"Both the earnings as well as the sentiment are kind of coming back a bit after the really overexaggerated move in the earlier part of the week," said Fabien Yip, a market analyst at IG.

"The AI demand story didn't really decelerate, it seems like it's still sustainable. So the selloff that we saw... is maybe the market overreacting to some of those concerns around (capex spending)."

Despite Friday's turnaround, the Kospi was still set to lose over 25% in July, marking its largest monthly loss since 1997.

Regulatory Response and Investor Impact

The wild swings in the market had prompted South Korean authorities to rein in the leveraged products that have wreaked havoc and wiped out the savings of some retail investors.

"(The market sentiment) is fragile around the AI debate," said Ji Young Park, senior EM equity portfolio manager at Amundi.

"The market performance has been narrow in Asia ex-Japan, mostly related to AI... given the sharp correction we've had across the markets that have AI exposure, we believe we are close to the end of this prolonged volatility."

Global Futures and Chinese Markets

Nasdaq futures were up 0.6% and S&P 500 futures added 0.3%. In Europe, EUROSTOXX 50 futures advanced 0.5%, while FTSE futures and DAX futures rose 0.25% and 0.34%, respectively.

Chinese markets followed suit. China's CSI AI index rose more than 7%. The Hang Seng Tech index advanced 0.5%.

Testing Tokyo's Resolve

The yen was 0.6% weaker at 160.55 per dollar, reversing some of Thursday's 2.4% surge after Japan intervened in the foreign exchange market to haul the currency away from 40-year lows.

In a rare move, South Korea's foreign exchange authorities also conducted dollar-selling intervention on Thursday, while the Nikkei reported that U.S. authorities also conducted so-called "rate checks", pointing to a possible coordinated intervention.

Currency Market Reactions

"The brutality of the move - USD/JPY falling from near-164 to sub-160 in a sharp jolt - is as poignant as the timing, just ahead of today's BOJ meeting," Vishnu Varathan, head of APAC macro strategy at Mizuho, said of Thursday's sharp rise in the yen.

"The timing is no coincidence. Clearly the authorities are pre-emptively warning or insuring against JPY selloff on an expected BOJ hold."

A trader, who declined to be named because they were not authorised to speak to the media, said dollar/yen liquidity was thin on Friday due to nerves over further action from authorities.

The strength in the yen in turn kept pressure on the dollar, leaving the euro perched near an over one-month high at $1.1514, while sterling bought $1.3457, holding to most of Thursday's 0.7% gain.

Middle East Uncertainty Lingers

Oil prices fell on Friday, with Brent crude futures were down 1.2% at $88.00 per barrel, while U.S. crude dropped more than 2% to $81.82 a barrel. [O/R]

A drone strike on gas vessels in Egypt's Mediterranean port of Damietta signalled a potential new front in the U.S.-Iran war, raising the prospect of threats to navigation through the Suez Canal, one of the last remaining export routes for Saudi oil.

Energy and Commodities Market Response

"The striking feature of the market reaction is that energy prices did not panic despite the deterioration in the conflict," said Rodrigo Catril, senior FX strategist at National Australia Bank.

Elsewhere, spot gold was down 0.5% at $4,082.88 an ounce. [GOL/]

(Reporting by Rae WeeEditing by Shri Navaratnam)

Key Takeaways

  • South Korea’s Kospi jumped around 14% intraday—a record reversal—riding gains in chip stocks and stabilized by regulatory easing, though it remains down sharply for the month. (apnews.com)
  • The yen rebounded sharply—dipping from near‑164 to below 160 per dollar—after suspected coordinated intervention by Japan, South Korea and possibly U.S. authorities ahead of the BOJ meeting. (investing.com)
  • U.S. Treasury yields held near 19‑year highs on the long end while short rates eased, steepening the yield curve and reflecting skepticism over the Fed’s ability to rein in inflation expectations. (apnews.com)

References

Frequently Asked Questions

Why did Asia stocks surge on Friday?
Asia stocks surged due to strong rebounds in key indices, optimism regarding AI-linked assets, and positive sentiment following Wall Street gains.
What caused the yen to rebound?
The yen rebounded after suspected coordinated intervention by Japanese and other authorities, just ahead of the Bank of Japan's rate decision.
How did South Korea's Kospi perform?
South Korea's Kospi soared 14% after recent heavy losses, although it was still set for its biggest monthly drop since 1997.
What impact did AI earnings have on Asian markets?
Positive earnings from AI heavyweights like Microsoft and Amazon improved market sentiment and contributed to the rebound of chip stocks.
How are oil prices being affected by Middle East tensions?
Oil prices edged higher as Middle East tensions persisted, with recent attacks raising the risk for critical export routes like the Suez Canal.

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