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Market-moving news for Sunday, October 18, 2026

2 stories that moved markets and the stocks we watch on Sunday, October 18, 2026.

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▼ Negative 10:49 PM ET Listen · Pro

Ukraine launches 1,000+ drone strike on St. Petersburg oil terminal, shattering Trump energy ceasefire (Oct 18)

What happened

Overnight into Sunday, Ukraine launched more than 1,000 drones at Russia in one of its largest aerial attacks of the war, setting the Petersburg Oil Terminal and the Ruchi oil depot in St. Petersburg ablaze. St. Petersburg Gov. Alexander Beglov said one person was killed and five injured, with 12 apartment buildings and two houses damaged; Russia's Defense Ministry claimed it downed 1,015 drones across 15 regions. The strike also hit an Ozon logistics hub and a VK data center, and temporarily suspended operations at Pulkovo Airport. Kyiv's move came in open defiance of President Trump's demand that Ukraine stop striking Russian energy infrastructure, after Zelensky said Russia had attacked Ukrainian energy sites 76 times in the past week despite the Oct. 11 energy-ceasefire announcement.

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Who’s affected & sources

Who’s affected

  • Energy/oil (WTI, Brent) — the strike hit the Petersburg Oil Terminal (capacity ~12.5M tons of oil products/year) and the Ruchi oil depot, adding to upward pressure on crude already near multi-month highs above $100/bbl WTI
  • Russian-exposed names and European refiners face supply risk. Broader equities — a fresh escalation in the Russia-Ukraine war and open friction between Kyiv and Washington adds geopolitical risk premium heading into a heavy earnings week.
▲ Positive TSMMU 8:49 AM ET Listen · Pro

Samsung to use TSMC 3nm process for Nvidia NVHBM base dies

What happened

Samsung Electronics will use TSMC's 3-nanometre process to produce the base dies for Nvidia's next-generation custom high-bandwidth memory (NVHBM) chips, the Seoul Economic Daily reported on Sunday, as carried by Reuters. It would be the first time Samsung has worked with TSMC at the HBM manufacturing stage. Nvidia has asked all three of its HBM suppliers — Samsung, SK Hynix and Micron — to use TSMC's process for NVHBM base dies and sixth-generation (1c) DRAM technology for the core dies. Samsung accepted Nvidia's requirements after an internal review, while planning to retain its in-house production model for standard HBM and custom products for other customers, and is assessing whether its own foundry could produce NVHBM base dies if demand exceeds TSMC's capacity.

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Who’s affected & sources

Who’s affected

  • NVDA (watchlist) — standardization of NVHBM across suppliers should deliver more consistent performance and de-risk supply for its next-gen GPUs; modest positive
  • TSMC (TSM) — incremental 3nm base-die volume from Samsung, SK Hynix and Micron; reinforces its grip on the AI supply chain; modest positive
  • Samsung Electronics — concedes its in-house turnkey HBM model to meet Nvidia's spec, but secures qualification for next-gen Nvidia memory; mixed-to-modest-positive
  • Micron (MU) and SK Hynix — face the same TSMC-3nm base-die requirement; standardization reduces supplier differentiation but locks in their roles in Nvidia's supply chain; mixed
  • Memory/HBM sector — Nvidia's standardization push lowers validation burden and could accelerate NVHBM adoption across AI accelerators

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Summaries and audio are produced with AI from the linked sources and may contain errors. Not investment advice. Each item links to its sources.