Stock Markets May 21, 2026 12:26 AM

Asian Markets Rally as Nvidia Beats Estimates; KOSPI Rockets on Samsung Union Deal

Tech-led gains follow strong Nvidia results while a last-minute pay pact at Samsung averts a large strike and lifts South Korean stocks

By Maya Rios NVDA

Asian equities climbed sharply after Nvidia reported stronger-than-expected quarterly results and offered optimistic revenue guidance, reviving appetite for semiconductor and technology shares. South Korea’s KOSPI surged on news that Samsung Electronics and its union reached a tentative wage agreement, suspending plans for an 18-day strike that would have involved about 48,000 workers. Broader market moves were also influenced by regional economic releases and signs of easing geopolitical pressure on energy routes.

Asian Markets Rally as Nvidia Beats Estimates; KOSPI Rockets on Samsung Union Deal
NVDA

Key Points

  • Nvidia's stronger-than-expected quarterly earnings and upbeat revenue guidance boosted technology and semiconductor shares across Asia, signaling continued demand for high-end AI processors and data-center infrastructure.
  • South Korea’s KOSPI surged 7.9% to 7,777.27 after Samsung Electronics and its union reached a tentative pay agreement that suspended plans for an 18-day strike involving nearly 48,000 workers, reducing fears of memory-chip supply disruption.
  • Regional macro data and geopolitical signals also influenced markets: weaker Australian jobs data lowered the likelihood of further RBA rate hikes, while developments around the Strait of Hormuz and comments on Iran lessened immediate energy-supply concerns.

Asian equity markets moved decisively higher on Thursday as a mix of corporate results, industrial labor developments and shifting geopolitical signals pushed investors back toward risk assets.

At the center of the rally were strong quarterly results from Nvidia, which reported better-than-expected earnings and optimistic revenue guidance. The report reinforced confidence that demand for high-end AI processors and related data center infrastructure remains robust, prompting a wave of buying in chip and technology stocks across the region.

South Korea’s benchmark KOSPI led gains, jumping 7.9% to close at 7,777.27 points in its most powerful session in months. Much of the upward move was tied to Samsung Electronics (KS:005930), which climbed almost 8% after the company and its labour union reached a last-minute tentative pay agreement. The pact halted plans for an 18-day strike that would have involved nearly 48,000 workers, easing investor worries about potential disruptions to global memory chip supplies at a time of elevated AI-driven demand.

Chip-related names broadly bounced following Nvidia’s results, as market participants interpreted the company’s performance and outlook as evidence that spending on advanced AI processors and data-center equipment is continuing to support semiconductor demand.

Markets elsewhere in Asia also saw notable moves. Japan’s Nikkei climbed 3.7%, while the broader TOPIX index rose about 2.1%. Australia’s S&P/ASX 200 gained 1.6% after weaker-than-expected jobs data reduced the perceived likelihood of further rate hikes from the Reserve Bank of Australia. India’s Nifty 50 increased 0.6%, and Singapore’s Straits Times Index edged up roughly 0.3%.

Chinese equities lagged some regional peers amid lingering caution over the property sector and uncertainty about the pace of additional policy support from Beijing. The Shanghai Shenzhen CSI 300 rose 0.6%, while the Shanghai Composite was effectively flat. Hong Kong’s Hang Seng index remained muted and did not participate fully in the regionwide advance.

Investor sentiment was also supported by signs of easing geopolitical pressure in the Middle East after reports that some oil tankers had resumed passage through the Strait of Hormuz, which reduced near-term concerns about major energy supply disruptions. Separately, President Donald Trump said the administration was in the "final stages" of negotiations with Iran, a comment that market participants viewed as raising hopes for a potential easing in tensions.

U.S. stock index futures traded near flat following earlier losses in Asian trading hours. Wall Street had finished higher on Wednesday ahead of Nvidia’s results, which arrived after the U.S. market close.


Regional economic releases also shaped market moves. Australia’s unemployment rate rose to 4.5% in April, the highest reading since late 2021, driven by an unexpected fall in employment. That development reinforced expectations that the RBA could pause its tightening cycle. In Japan, exports expanded strongly in April, but business activity indicators showed the services sector slipping back into contraction even as manufacturing growth held steady, underscoring a fragile recovery. Japan’s factory activity expanded for an 11th consecutive month in May, though growth decelerated modestly as manufacturers coped with softer external demand and rising input costs.

Overall, the market reaction combined corporate earnings momentum, averted industrial action in a strategically important semiconductor hub, mixed domestic economic data and improving short-term geopolitical signals to produce a broad-based rally dominated by technology and chip-related stocks.


Market snapshot:

  • KOSPI: +7.9% to 7,777.27
  • Samsung Electronics (KS:005930): ~+8%
  • Nikkei: +3.7%
  • TOPIX: ~+2.1%
  • S&P/ASX 200: +1.6%
  • Shanghai Shenzhen CSI 300: +0.6%
  • Shanghai Composite: flat

Note: All moves described above reflect reported market closes and company announcements that shaped trading on the day.

Risks

  • Uncertainty over the outlook for China’s property sector and the pace of additional policy support from Beijing could weigh on Chinese equities and related sectors.
  • Geopolitical tensions remain a variable risk for energy and shipping markets despite recent resumption of some tanker movements through the Strait of Hormuz.
  • Domestic economic fragility in parts of the region - illustrated by Japan’s uneven services-sector data and Australia’s rise in unemployment - could complicate central bank policy paths and investor expectations.

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