Global Market Pulse — Tuesday, Sep 15, 2026

Faircurve Research

Global Cross-Asset Daily

On Saturday the head of Anthropic asked leading artificial-intelligence labs to slow how fast their models gain new capability, and the heads of OpenAI and xAI backed him within a day. Investors spent Monday selling the companies paid to build that capacity and buying the companies paid to use it. The US chip index fell 5.86%, its fourth-largest fall of 2026 and the largest since 1 July. Communications rose 2.19% and technology fell 1.81%. The S&P 500 fell 0.48% to 7,619.98 and the VIX rose 1.26 points to 17.10. Brent rose 1.02% to US$105.68 after Saudi Arabia shut an export pipeline.

§ 01 — Equities · United States

All four indices fell. The Dow lost least at 0.29% and the Nasdaq most at 0.56%. The S&P 500 fell 0.48% to 7,619.98 and the Russell 2000 0.40%. The damage was narrow. Twenty of the thirty Dow members rose, and the index still lost 152.09 points, because Goldman Sachs and Caterpillar between them took US$75.30 off constituent prices against a net US$25.61 across all thirty. Goldman fell 3.96% and Caterpillar 4.22%. All four are lower on the week, the Russell 2000 worst at 2.80%.

§ 02 — S&P 500 Sector Map

Monday 14 Sep · sorted best to worst (1D)

Three of eleven sectors rose. Communications led at 2.19%, health care rose 1.45% and staples 1.25%. Technology fell most at 1.81%, then industrials at 1.42% and utilities at 1.34%. The five sectors that supply a data centre all fell: technology, industrials, utilities, materials and property. Energy fell 0.94% on a day crude rose, opening within ten cents of its session high and closing near its low. On the week only communications, up 2.71%, and energy, up 0.73%, rose. Materials is the week’s worst at 3.72% lower.

Full table · sorted by YTD

§ 03 — Equities · Global

Global rows reference Monday 14 September closes from FMP end-of-day data. One-day moves compare with Friday 11 September. One-week moves compare with Monday 7 September for every market outside the United States, and with Friday 4 September for the US tables, because US markets were shut for Labor Day on 7 September. Year-to-date compares with each market’s last 2025 close. Tokyo, Seoul, Taipei, Hong Kong, Shanghai and Singapore all closed before the New York open. The dollar bought 154.41 yen at Monday’s close against 153.47 on Friday.

Seoul fell 3.26%, the worst of the ten markets shown and more than four times Taipei’s 0.70%. Korea is where most of the world’s memory chips are made. Tokyo fell 0.81%, Paris 0.76% and the STOXX 600 0.49%. Hong Kong rose 0.45%, London 0.44% and Singapore 0.39%. Every one of the ten is lower on the week. Seoul still leads the year at 58.62%, just ahead of Taipei at 58.35%. The dollar bought 154.41 yen, 0.62% more than on Friday, before the Bank of Japan decides on Friday, consensus 1.25% from 1.00%.

§ 04 — US Treasuries

3.5% 4.0% 4.5% 5.0% 6M 2Y 5Y 10Y 20Y 30Y

The six-month bill rose 6 basis points to 4.18%, the largest move anywhere on the curve. It now sits 18 basis points above the 4.00% the Federal Reserve is expected to set on Wednesday, against 12 basis points on Friday. That bill spans this week’s meeting and the two after it, so the distance prices rises beyond this one. Every maturity from one month to ten years closed at a 2026 high for a second session. The two-year rose 2 basis points to 4.65% and the ten-year 1 to 4.97%. The twenty- and thirty-year each fell 1, to 5.37% and 5.34%, on a day Brent rose 1.02%. The gap between two-year and thirty-year yields narrowed to 69 basis points from 86 on 8 September, the smallest of 2026. On the week the two-year rose 28 basis points and the thirty-year 10.

§ 05 — Credit Spreads

Friday’s reading widened CCC-rated spreads 6 basis points to 1,076. High-yield spreads narrowed 5 to 265 and investment grade held at 80. The gap between the CCC and high-yield spreads reached 811 basis points, wider than the 800 flagged in Friday’s letter and the widest of 2026. Higher yields this year have raised what every borrower pays. Only the weakest also pay a wider spread on top, 191 basis points more than at the end of 2025, while high yield is 16 narrower. Tonight’s reading covers Monday: high yield above 275 would say the strain is spreading upward.

Credit spreads are FRED ICE BofA option-adjusted spreads (IG BAMLC0A0CM, BBB BAMLC0A4CBBB, HY BAMLH0A0HYM2, CCC & Lower BAMLH0A3HYC) as of the Friday 11 September close, the latest observation FRED had published at this letter’s deadline. FRED posts one business day in arrears, so Monday’s reading arrives tonight and this section does not yet reflect the session the rest of the letter covers. One-day changes reference Thursday 10 September, one-week changes Friday 4 September, and year-to-date the last 2025 observation. Widening (positive basis points) reads as stress. Narrowing reads as relief.

§ 06 — Digital Assets

Bitcoin rose 1.24% to US$78,168.09 on a day the Nasdaq fell 0.56%. Ether was close to unchanged at US$2,514.61 and Solana rose 0.07% to US$102.52. Bitcoin is 1.17% lower on the week and 10.66% lower on the year. The Senate votes today at 14:15 Eastern on whether to advance the Clarity Act, which sets out how digital assets are regulated. Sixty votes are needed and Republicans hold 53, so the bill cannot proceed without Democratic support. That vote is the clearest near-term test of the policy support priced into these assets.

Levels are FMP end-of-day closes for the UTC day ended Monday 14 September. The one-day change compares with Friday 11 September, the one-week change with Monday 7 September, and year-to-date with the 31 December 2025 close. Crypto trades through the weekend, so the Saturday and Sunday sessions sit inside the one-week window but outside the one-day change. Bitcoin’s equity link reflects the historical daily-return pattern, closest to the Nasdaq at about 0.5 and loosest to the Dow at about 0.4.

§ 07 — Metals & Energy

Saudi Arabia shut its East-West pipeline after drone attacks. Brent rose 1.02% to US$105.68 and WTI 1.34% to US$101.39. Oil is 7.92% and 9.37% higher on the week. All three metals fell, and in order of size: copper 2.19% to US$6.40, silver 1.61% to US$64.14 and gold 1.29% to US$4,351.90. Copper is 6.14% lower on the week, the largest weekly fall in this table, and it is the metal a data centre consumes most. Natural gas rose 2.30% to US$2.90.

Commodity rows are Monday 14 September settlements from FMP end-of-day data. One-day changes compare with Friday 11 September, one-week changes with Monday 7 September and year-to-date with the last 2025 settlement. Tuesday morning quotes are live and are not shown.

§ 08 — Economic Calendar

US release times are Eastern. Other rows carry their local time zone. Consensus figures are FMP-sourced as of this morning. The Senate votes today at 14:15 Eastern on whether to advance the Clarity Act, the digital-asset market-structure bill, which needs 60 votes to proceed.

The Federal Reserve decides on Wednesday at 14:00 Eastern, consensus 4.00% from 3.75%, with new rate projections and Chair Warsh’s press conference at 14:30. August retail sales come the same morning, consensus 0.4% after a 0.4% fall. Empire State manufacturing and Chinese August activity land today. The Bank of England decides on Thursday, consensus 3.75% unchanged, and the Bank of Japan on Friday, consensus 1.25% from 1.00%.

§ 09 — Macro Themes

1 · Investors marked down the cost of building artificial intelligence, not the demand for it. Chips, machinery, power, materials and property all fell. Alphabet, Meta, Netflix and Microsoft rose. Communications finished four points ahead of technology on the day and is 2.71% higher on the week.

2 · That trade is not new. Monday was its fifth run this year. Four 2026 sessions saw a wider gap in communications’ favour: 29 January, 5 June, 23 June and 1 July. Over the five sessions after each, the gap widened twice and closed twice. The pattern carries no edge either way.

3 · The market now prices rises beyond Wednesday’s. The six-month bill, which spans this week’s meeting and the two after it, rose 6 basis points to 4.18%, the largest move on the curve. It sits 18 basis points above the 4.00% consensus, against 12 on Friday.

4 · Long-maturity lenders did not read the oil shock as inflation. Brent rose 1.02% after Saudi Arabia shut a pipeline, and the thirty-year yield fell 1 basis point. Energy shares did not follow the oil price either, closing 0.94% lower.

§ 10 — Analysis & Nuances

Monday’s selling was precise. It hit the supply chain of artificial intelligence and spared the users of it. The chip index fell 5.86%, with Marvell down 7.32%, Intel 5.59% and Micron 5.25%. Seoul, where most memory is made, fell 3.26% hours before New York opened. Caterpillar, which sells the engines that power data centres, fell 4.22% and was the Dow’s second-largest dollar drag. Copper, the metal those buildings consume most, fell 2.19%. Netflix rose 3.77%, Alphabet 3.22% and Meta 2.71%. A slower race costs the suppliers revenue and saves the users money, and the prices moved accordingly.

One test settles whether the build was really marked down. A separate one settles the rate question. On the build: whether communications stays ahead of technology through Friday’s close, and whether copper closes below US$6.30 while Brent holds above US$100. Together those separate what it costs to build from what it costs to run. The four earlier wide-gap days of 2026 split two and two on that follow-through, so history offers nothing here. On rates: Wednesday’s projections against the six-month bill at 4.18%. A fall from there after a 4.00% decision says the Federal Reserve showed fewer rises than the market priced. A rise says more. Either way both groups move together, because both are valued on distant profits.

FAIRCURVE · MARKET PULSE · 15 SEP 2026 · Data: Financial Modeling Prep and FRED (ICE BofA credit spreads). Figures reference the Monday 14 September 2026 session. Not investment advice. For informational use only.