Good evening. A Chinese memory-chip maker says it has a denser design ready for production, and that single claim just erased more than $100 billion off global chip stocks and forced Seoul's first trading curb in close to two months.

ChangXin Memory Technologies, a Chinese chipmaker, said Monday it has made progress on a design that fits more memory cells onto each chip, a breakthrough that could ease the tight supply pushing memory prices higher, the South China Morning Post reported.

Micron fell about 4.5% in New York, erasing roughly $52 billion; Sandisk dropped 6.6%, or about $15 billion; and SK Hynix lost around $41.5 billion in Seoul, Benzinga reports. Korea's Kospi then slumped 6.12% to 5,993.62 on Tuesday, tripping a sell-side trading curb for the first time in almost two months as foreign investors dumped Samsung and SK Hynix, Saxo Bank reports. Japan's Nikkei fell 2.22% returning from a long weekend, and Hong Kong and Shanghai slipped too.

Australia felt it differently. The ASX 200 barely moved, closing up one point at 8,783.9 after an intraday fall of more than half a per cent, as a 1.39% jump in financials offset a 4.37% slide in tech, Market Index reports. Local AI and data-centre names took the real hit: Megaport fell 9.9%, Codan dropped 6%, and engineering firm SKS Technologies lost a fifth of its value as AirTrunk pushed back a planned Singapore listing, citing rates and volatility. Lithium stocks fell too, after the European Union moved to cap imports of Chinese hybrid-battery materials. New Zealand's NZX 50 slipped roughly 0.1% to about 13,760, Trading Economics shows, as the same regional nerves spread across the Tasman.

Source: Benzinga, 12 Oct 2026 → · Source: Saxo Bank, 13 Oct 2026 → · Source: Market Index, 13 Oct 2026 → · Source: Trading Economics, 13 Oct 2026 →

RBA minutes turn hawkish, keep door open to more hikes. Minutes released Tuesday from the Reserve Bank's late-September meeting, where the board had already lifted the cash rate 25 basis points to 4.60%, show policymakers judging that "further tightening remains on the table" ahead of the next decision on 3 November, Investing.com reports. Banks rallied on the news, with Commonwealth Bank up 2.3% to $154.50, even as NAB's business confidence index slid four points to -13, well below its long-run average, Market Index reports.

Source: Investing.com, 12 Oct 2026 → · Source: Market Index, 13 Oct 2026 →

Saudi Arabia extends airport closure, airlines cut flights. Saudi authorities have extended the shutdown of Riyadh's King Khalid International Airport to 17 October following last week's Houthi missile strikes, and Etihad and Qatar Airways have both suspended flights to Saudi cities, Greek Reporter reports. Brent crude eased about 1% to roughly $105.50 a barrel and US benchmark WTI slipped to about $92.80, pulling back from Monday's near-$107 peak, as reports that Russia will ship extra diesel to global markets eased supply anxiety, HDFC Sky reports. The Russia-Ukraine "energy ceasefire" Donald Trump claimed over the weekend is still unconfirmed on the ground. Gold held just under $4,200 an ounce.

Source: Greek Reporter, 13 Oct 2026 → · Source: HDFC Sky, 13 Oct 2026 →

Wall Street earnings season opens as Monday's gains hold. The S&P 500 closed Monday down a slim 0.06% at 7,807.24 and the Nasdaq 100 fell 0.71% on the chip rout, while the Dow added 0.38% to 51,856.18 even with bond markets shut for Columbus Day, Saxo Bank and Newsquawk report. JPMorgan, Goldman Sachs, Citigroup and Wells Fargo all report third-quarter results before Tuesday's opening bell, the first wave of big US bank earnings, XTB reports; none had landed by the time this was written, hours before New York opens.

Source: Saxo Bank, 13 Oct 2026 → · Source: Newsquawk, 13 Oct 2026 → · Source: XTB, 13 Oct 2026 →

Notice what actually happened today, and what didn't. CXMT hasn't shipped a single one of these denser chips yet — it published a claim, and Seoul erased six per cent before lunch anyway.

Trump hasn't delivered a barrel of the Russian diesel he announced over the weekend, and oil eased back regardless. The RBA hasn't raised rates since September, yet Australian banks jumped simply because the minutes kept the option open for November.

Markets used to wait for confirmation before they moved. Lately they price in the claim first and sort out the facts afterwards — a nervier way to trade than it looks, and one that leaves anyone who bought Korean chip stocks on today's dip betting on a press release, not a production line.