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South Korea’s KOSPI fell as much as 8% on Thursday, triggering a circuit breaker that halted trading at midday, according to market posts on X. Chipmakers Samsung Electronics and SK Hynix led the losses with declines of 9% to 11%. The drop wiped out the index’s gains since its June peak and extended its longest losing run in years. Earlier in the session, Korea Exchange paused program selling for five minutes after the index fell 6%. Market commentators linked the selloff to stronger-than-expected US inflation data, which raised expectations of tighter Federal Reserve policy, as well as concerns over AI spending, debt at providers such as CoreWeave, and rising Chinese chip competition. Japan’s Nikkei also fell nearly 4%.

Nvidia’s share of China’s data center AI chip market dropped to 34% in the first half of 2026, according to IDC. Its shipments to China totaled 678,000 units, down 44% from a year earlier, as US export controls limited supply. IDC did not say which products it counted, so it is unclear whether banned chips such as the B200 and B300 are included. Huawei shipped 572,000 AI chips, up from just over 300,000, and now holds 28% of the market. T-Head has 7%, Cambricon 5%, Kunlunxin 4% and Hygon 3%. Nine of the 11 Chinese chipmakers IDC tracks grew shipments. China’s total reached 2.008 million units. GPU shipments fell 26% to 991,000, while non-GPU AI chips rose nearly 80% to 1.016 million, passing GPUs by volume for the first time. Huawei, T-Head, Kunlunxin and Cambricon make up 95% of that segment.

South Korea’s KOSPI fell as much as 6.1% to near 5,996, its fifth straight daily loss and a drop of more than 15% in five sessions, leaving it roughly 35% below its June record high. Bull Theory estimated about ₩229 trillion ($150 billion) in market value was erased. Memory stocks led the rout, and Samsung and SK Hynix make up about half the index. Samsung fell as much as 6.8% and SK Hynix as much as 8.5%, with Samsung down more than 17% in five days. The exchange triggered a sell-side sidecar, pausing program selling for five minutes after KOSPI 200 futures dropped 5.1%. The posts do not give a cause for the selloff.

Goldman Sachs has upgraded equities to overweight over the next three months and bonds to overweight over the next 12 months. The bank expects improving valuations, resilient corporate earnings and easing inflation to support markets into 2027. Goldman favors AI-linked stocks and selected dividend-paying companies but warns that rising bond yields and geopolitical tensions could keep markets volatile. Investors will watch inflation data, earnings and interest-rate trends for further direction.

Nvidia (NVDA) was up nearly 2% in premarket trading on October 9, at $234.27, after three straight losing sessions. The stock hit a record $243 intraday on October 6, then slid almost 3% on Thursday to $230.48 as the wider market weakened. Dip buyers stepped in as TSMC reported record revenue and Cantor Fitzgerald said Micron’s HBM supply and pricing outlook was intact, which lifted Micron and SK Hynix. Nvidia trades at about 29 times forward earnings. Traders are watching $240 as resistance, with a close above the $243.37 record on heavy volume needed to confirm a fresh rally. Support sits at $230, then $220 to $221.39.

Hong Kong stocks fell on October 9 as rising oil prices, Middle East tensions and concerns over high interest rates weighed on investor sentiment. The Hang Seng Index dropped 344 points, or 1.43%, to close at 23,785. The Hang Seng Tech Index fell 2.89% to 4,073, its lowest level since September 2024. HSBC Holdings shares declined 4.8%. Weak mainland China holiday consumption data added to market concerns. US stocks also ended mixed, with the Nasdaq Composite falling 1.25% and the S&P 500 declining 0.47%. Bitcoin fell as much as 3.8%, while gold rose up to 0.85%.

Crude oil prices fell on October 9, 2026, after US President Donald Trump said Washington would not attack Iran before the November midterm elections, easing concerns about further disruptions to global oil supplies. Brent crude futures declined 1.3% to $102.91 per barrel, while US West Texas Intermediate (WTI) fell 1.2% to $90.40. Prices had surged around 4% in the previous session amid Middle East tensions and supply concerns linked to Hurricane Isaias in the Gulf of Mexico. Traders are now monitoring US-Iran negotiations and potential disruptions to oil shipments through the Strait of Hormuz.

Tata Consultancy Services (TCS) shares has surged 6.2% on October 9, 2026, after the company reported its second-quarter FY27 results. Investor sentiment improved as TCS maintained its operating margin at 24% despite higher investments in artificial intelligence (AI). TCS reported a net profit of ₹13,884 crore, up 14.9% year-on-year, while revenue increased 11.2% to ₹73,188 crore. Its annualised AI revenue reached $3.1 billion, up 20% quarter-on-quarter. The broader IT sector also rallied, with investors looking past concerns over US work visa restrictions.

Dow Jones futures fell 0.9% in premarket trading on Thursday, S&P 500 futures dropped 0.5% and Nasdaq-100 futures lost 0.7%, a day after US stocks slipped from record highs. Oil is the main pressure. Crude rose on supply worries from the Middle East, with attacks on tankers in the Strait of Hormuz hitting their highest weekly level since the Iran war began, according to Reuters. About 20% of global oil and fuel supply moved through the strait before the war. Higher energy costs are keeping inflation fears alive. The Fed voted unanimously to raise rates in September, and Governor Chris Waller speaks in Turkey on Thursday, which could give clues on the next move. The 10-year Treasury yield was near 5.28% and the 30-year near 5.66%. Investors are also weighing the start of earnings season.

The Nasdaq Composite fell 100.07 points, or 0.36%, to 27,499.82 at 1:19 PM ET on Wednesday, giving back some ground after a second straight record close of 27,599.79 on October 6. The index traded between 27,341.31 and 27,502.43 as investors waited for the minutes of the Fed’s September 15-16 meeting, due at 2:00 PM ET. At that meeting policymakers raised the federal funds target range to 3.75% to 4.00%. Tuesday’s records for the Nasdaq and S&P 500 came on AI and chip stocks, easing Treasury yields and steadier crude prices. The 10-year yield stayed near 5.30%. The rally was narrow: the Russell 2000 fell about 0.6% while the big indexes rose.

Warren Buffett has never forecast a crash, but Wall Street’s record run has people revisiting what he says about surviving one. Both the S&P 500 and Nasdaq finished at all-time highs on October 6, powered by tech and AI shares, even as the 10-year Treasury yield pushed past 5.3%, a level not seen in about 24 years. Panmure Liberum has warned that the S&P 500 could slide to 5,000 by late 2027, more than 35% below current levels, though several other firms take a much rosier view. Buffett’s playbook is about endurance. He warns against borrowing to buy shares and has pointed out that Berkshire’s own stock has dropped around 50% more than once, with another such fall certain to come at a time no one can name. His guidance boils down to a long holding period, little or no leverage and no panic selling. In his 1996 letter he went further, suggesting that anyone who expects to bail out during a crash may be better off not owning stocks.

Tesla (TSLA) fell early Wednesday after three straight days of gains, with investors turning back to European self-driving regulations. The stock closed Tuesday at $380.68, up 0.51%, and traded near $377.60 in later quotes, down 0.81%. Shares are still down about 16% this year. Third-quarter EV deliveries came in well ahead of Wall Street estimates, and the stock rose on the news. Higher oil prices from geopolitical tensions have supported EV demand. Second-quarter deliveries grew 25% year over year to 480,126, the fastest annual growth in about two years.

Dow Jones futures fell 0.7% on Wednesday morning, while S&P 500 futures lost 0.3% and Nasdaq-100 futures dropped 0.6%. Both indexes had closed at record highs the day before. Selling in global bonds pushed the 30-year Treasury yield up to 5.70%, its highest level since 2002, as investors waited for the minutes of the Fed’s September meeting, when policymakers raised rates to fight inflation. The minutes should show whether that hike was a one-off or the first of several. Traders priced roughly 20% odds of another hike at the Fed’s October meeting next week.

SpaceX has reportedly rebounded about 60% from its recent low as investors focus on its expanding AI business. The company is reportedly seeking $40 billion to buy Nvidia chips for its AI infrastructure, while Elon Musk plans to build 10 GW of AI capacity by 2027. Stronger-than-expected earnings and rising Starlink subscribers have also supported the recovery. SpaceX shares previously fell from $225 to about $105 amid valuation and spending concerns but have since climbed above $170.

Anthropic is reportedly preparing a Nasdaq listing this fall, with Reuters saying marketing could begin in mid-October at the earliest and the listing could finish before the November midterms. Nothing is confirmed until a public prospectus is filed, and IPO timelines often shift. If it lists at the roughly $2 trillion valuation investors reportedly expect, Anthropic would clear the top-40 threshold under Nasdaq’s May 2026 “fast entry” rule and could join the Nasdaq-100 after 15 trading days. More than $800 billion tracks the index, so funds like QQQ would have to buy shares. SpaceX followed the same path, joining on July 7 after its June 12 debut, with J.P. Morgan estimating about $4.3 billion in passive inflows. It entered below a 1% weighting because index weights count only tradable shares, and its stock fell nearly 6% on the day it joined.

Nvidia shares climbed above $243 to a fresh record, after closing at a record $238.90 on Monday, October 5. At that close the chipmaker was worth about $5.8 trillion, roughly 4% short of $6 trillion, a level no company has reached. Higher semiconductor price targets across Wall Street are fueling the rally, and the move breaks past $236, where sellers had repeatedly blocked a breakout. History offers a warning. Five times a US company has been first to a new trillion-dollar level, Apple at $1, $2 and $3 trillion and Nvidia at $4 and $5 trillion. In the following 12 months, returns ranged from a 31% loss to a 27% gain, and the stock beat the S&P 500 only twice. Rising data-center financing costs and increasingly complex funding structures could also make the next leg harder.