Brent crude traded above $100 a barrel on Wednesday morning, at $100.91 as of 13:32 UTC, up 3.1% on the day and back at a level it last saw in July. US crude is at $95.93, up 3.1%. The trigger is the same sequence that ran through Tuesday’s session: US Central Command said it destroyed five Iranian tankers after missile attacks on a US warship, Iran’s Revolutionary Guard said it hit two US vessels and eight tankers in the Strait of Hormuz, and Houthi forces struck Saudi oil facilities including the 400,000-barrel-a-day Jazan refinery. Tanker traffic through Hormuz is close to a standstill.
Europe sold on it. At midday the Stoxx Europe 600 was down 1.3%, the Euro Stoxx 50 1.6%, Germany’s DAX 1.4%, France’s CAC 40 1.5% after being down 1.9% earlier, Spain’s IBEX 2.2%, the Netherlands 1.3%. US futures were lower into the open, S&P 500 futures −0.3%, Nasdaq 100 futures −0.4%, Dow futures −0.5%, after Tuesday’s 628-point Dow fall. The 10-year Treasury yield closed Tuesday at 4.806%, its highest since October 2023, and traded above 4.80% again this morning; CME FedWatch has a quarter-point Fed hike on September 16 at 60%.
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The instrument we keep for a day like this is the one we used on Tuesday: not the index level, but the sort. Oil at $100 does not sell the whole market. It sells the parts of the market whose cash flows a higher discount rate hurts most and buys the parts with contracted demand and pricing power. Tuesday’s close showed the pattern; Wednesday’s open extends it, and the rest of this note is about where the line runs today and what decides tonight.
What oil at $100 sells: Europe, health care, software, and the long bond
Europe is the most exposed developed market to Gulf crude and it traded that way. Our Euro-AI 50 is down 1.6% intraday on the worker’s 13:31 UTC recomputation, with the Defense & Aerospace sub-index −2.4% and Industrial AI & Robotics −1.8%; Dassault Systèmes, which fell 7.5% on Tuesday, leads the enterprise names lower. On Tuesday’s US close the sort was already visible in the eleven S&P sectors: energy +1.1% and utilities +0.9% were the only gainers, health care −2.5% was the worst (Amgen −10.1%, Stryker −8.8%, Boston Scientific −5.9% on a cyberattack that voids its guidance), financials −1.4%, materials −1.0%.
Software took the second leg of the selling. The iShares software ETF closed Tuesday at $102.66, down 1.8%, its second straight decline and 6.7% below where it started September; inside our Agentic Winners 40, down 2.8% to 922.93, the Control Plane tier lost 3.4% (ServiceNow −5.0%, Workday −4.9%, UiPath −7.8%), Application Leaders 3.0% (Atlassian −6.9%, Intuit −4.1%), Endpoints 2.9% (Shopify −7.6%). The reading is a rates trade and an AI-loser trade at once, and on a day the 10-year makes a three-year high the two cannot be separated.
The long bond is the fourth casualty. TLT closed Tuesday at $82.20, unchanged on the day but sitting on the $82 line where our wave count on the fund reads wave C possibly complete, with the count breaking on a close above $88.49. The MOVE index of bond volatility rose 4.2% to 76.1 on Tuesday, the Nasdaq volatility index 8.3% to 21.7, the VIX 2% to 16.0 and a further 2.8% to 16.2 this morning. Gold did what gold does in a hike week: futures fell to $4,341 overnight, below the 50-day average at $4,402, then rebounded to $4,464 by 13:32 UTC, up 0.6% on the day. The dollar index is at 98.67, near a two-week low, because the yen at 153.3 and the won are stronger, not because the euro is.
What holds: memory, the pipe, and Korea
The other side of the sort is the same as Tuesday’s. The Philadelphia Semiconductor index rose 1.3% on Tuesday while the S&P fell 0.6%, and in pre-market trading this morning the memory names were higher again: Micron, Western Digital, Seagate, SanDisk and the SK hynix ADR all up, SK hynix and SanDisk by more than 1%, AMD higher, Intel −0.7% after its 9.1% jump on the processor price rise. Qualcomm added to Tuesday’s 3.2% gain on the Amazon deal for up to $60 billion of custom chips and optical links. The winners inside our Rubin 100 on Tuesday were the parts of the build-out closest to the finished data centre: DC Power & Electrical +5.1% (Bloom Energy +9.6% on its S&P 500 inclusion), Foundry & Integration +2.6%, High-Speed Interconnects +2.3% with Lumentum +11.0%, Coherent +7.1%, Corning +7.6% on 80 million miles of Verizon fibre. Rubin itself closed flat, +0.1%, because its US members rose 2.2% and its Japanese members fell 4.1% on the yen.
Asia voted for the third day and voted for chips. The Kospi closed at 7,068.05, up 1.6%, the first close above 7,000 since July 23: the index traded above that level from May 6 to July 23 and closed as high as 9,114.55 on June 22, so this is a recovery through a round number, not a new high, and we say so here because our Tuesday edition wrongly called Monday’s open the first ever. SK hynix was up 3.1% at mid-session, Samsung Electronics flat, institutions buying and individuals selling for a fifth day. Tokyo split the way New York did: the Nikkei closed flat, the equipment makers Advantest and Tokyo Electron fell, and the cable makers rose on the Verizon–Corning deal, Furukawa Electric by 13%. Hong Kong closed down 0.2% with Lenovo +6% after Tuesday’s fall. Copper is the quiet confirmation: LME three-month copper settled at a record $14,728 a tonne on Tuesday, and Comex copper at $6.82 a pound this morning is at Tuesday’s record.
Two of our indices sit exactly on the line. HALO 100 fell 0.5% on Tuesday with its drug and device names down 3% to 10% and its energy-transition and copper names up 3% to 13%: Enphase +6.8%, Fluence +6.7%, Ivanhoe Mines +12.8%, Prysmian +9.7%. The Agentic Ecosystem was flat, −0.2%, with the compute layer up 3.3% (CoreWeave +11.7%, Nebius +7.7%) against security and identity down 2% to 4%. Same index, two directions, one oil price.
What decides tonight, in order
First, the close itself: whether Brent holds $100 through the US session, and whether the S&P closes a third day lower while the semiconductor index closes higher. A third day of that pattern is the narrowest AI tape since the spring. Second, the print record. Zscaler reported from a $177.80 close last Wednesday, beat on every line, and closed Tuesday at $161.94, down 8.9% from the entry; it needs to be above $172.47 at tonight’s close for the reaction to count as anything but sold, which would be the third beat-and-sold software grade in a week. Samsara reported the same evening from $38.75, jumped 13% after hours and closed Tuesday at $40.15, above the $39.91 line that makes it paid. Two cards from one evening, heading for opposite grades, is the software-versus-physical-operations sort in miniature.
Third, the rest of the day’s calendar: Apple’s product event at 1 pm ET, the 10-year Treasury auction at 1 pm ET on the day the yield sits at its highest since 2023, and the Treasury’s announcement of the size of its expanded debt buyback programme, which the market reads as the government’s first direct response to the sell-off in long bonds. Fourth, the week: the ECB decides Thursday with markets leaning toward a quarter-point increase, US producer prices Thursday at 08:30 ET, consumer prices Friday, Oracle and Adobe report Thursday after the close, the Fed meets September 15–16 and the Bank of Japan September 17–18.
None of this is a forecast. Oil at $100 two days before an inflation print makes the hike the base case and keeps the software and health-care selling going; it does not touch a customer who has already signed for fibre, chips or power. The line between the two is where the tape is trading, and tonight’s two grades put a number on it.
The signals behind thisEach line links to the tool it comes from
SignalsPrint record — Zscaler (needs $172.47) and Samsara (paid above $39.91) are graded at tonight’s close→IndicesRubin 100 — flat on Tuesday because US members +2.2% and Japanese members −4.1% cancelled; DC Power +5.1%, Interconnects +2.3%→IndicesKOSPI — closed 7,068, first close above 7,000 since July 23; now a full terminal chart with candles and studies→LabSovereign pressure — 10-year 4.81% highest close since October 2023, 30-year 5.26%, hike odds 60%→LabResource markets — Brent through $100, LME copper at a record $14,728 a tonne→