Market Pulse — Wednesday, 19 August 2026

Global Cross-Asset Daily

Energy and health care closed at 2026 highs on the day the index fell. The S&P 500 lost 0.67%, a third straight decline, and the Nasdaq fell 1.33%, its largest daily fall since 29 July. A morning rise in long yields set the selling off and faded by the close, the 30-year finishing 3 basis points lower at 5.28%. Brent rose 0.17% to US$91.02, its highest close since 24 July. As this letter went out, Seoul had fallen as much as 6.8% in live Wednesday trade before recovering part of the drop.

§ 01 — Equities · United States

The S&P 500 fell 0.67% to 7,693.26, a third consecutive decline, each larger than the last. It now sits 1.36% below its 13 August record close. The Nasdaq’s 1.33% fall was its largest since 29 July. The Russell 2000 lost 1.30% and the Dow 0.22%, the mildest of the four. The VIX rose 4.28% to 15.84.

§ 02 — S&P 500 Sector Map

Tuesday 18 Aug · sorted best to worst (1D)

Four sectors rose on a falling day, and two of them closed at 2026 highs. Energy gained 1.76% to its highest close of 2026, its second consecutive 2026 high, and health care rose 1.60% to a 2026 high of its own. Staples added 1.06% and financials 0.45%. Technology fell 2.47%, the worst of the eleven: Nvidia lost 2.34%, AMD 4.27% and TSMC’s US shares 4.07%.

Full table · sorted by YTD

§ 03 — Equities · Global

All figures reference Tuesday 18 August closes from FMP end-of-day data. Seoul was closed Monday for the Liberation Day substitute holiday, so the KOSPI one-day change compares Tuesday with the Friday 14 August close. Tokyo was closed Tuesday 11 August for Mountain Day, so the Nikkei weekly change is measured from Monday 10 August. All other one-week moves compare with Tuesday 11 August, and year-to-date with each market’s last 2025 close. Wednesday’s live Asian session is not included in this table.

Asia’s chip-heavy markets fell hours before New York did. The Nikkei lost 2.54% on Tuesday, the table’s largest fall, the KOSPI 1.55% against its Friday close, and the TAIEX 1.20%. The CAC 40, Europe’s weakest, fell 0.82%. The three risers, London, Hong Kong and Shanghai, each gained less than 0.2%. In live Wednesday trade, read at 10:00 Seoul time, the KOSPI was about 4.3% lower after falling as much as 6.8% at the open, and Tokyo was about 2.4% lower. Early reports pointed only to the global bond selling, nothing Seoul-specific. Seoul is the sharpest version of the same trade: the KOSPI’s 63.01% gain for 2026, the table’s largest, sits heavily in chipmakers, so a repricing of distant profits reaches it first.

§ 04 — US Treasuries

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

The long bond finished Tuesday below where it started, and the morning was the story. Every maturity from five years out closed lower than Monday. The 5-year fell 1 basis point to 4.37%, the 10-year one to 4.71% and the 30-year three to 5.28%. The 2-year held at 4.19%. In the morning the 30-year had traded above Monday’s 5.31% close, and TLT, the largest long-bond fund, opened below Monday’s level before finishing 0.38% higher, a price rise and a yield fall. The gap between 2-year and 30-year yields narrowed to 109 basis points from 112. The 20-year sells Wednesday at 13:00 New York time with the market at 5.28%, about 12 basis points above July’s 5.163% result. Bills out to three months continue to pay less than the 2-year note, so the market’s priced path is still fewer increases, not cuts.

§ 05 — Credit Spreads

Credit moved little while equities fell. The latest observations run through Monday: high yield widened 3 basis points to 270, the weakest borrowers 6 to 1,018, investment grade 1 to 81. Weekly moves are 3 basis points or less at every grade except the weakest, at 4. Credit prices default risk from intermediate maturities, and those yields have barely moved: the 5-year sits 2 basis points below a week ago. If Tuesday’s equity rotation carried news about borrower health, these spreads would show it first. They do not.

Credit spreads are FRED ICE BofA option-adjusted spreads (IG BAMLC0A0CM, BBB BAMLC0A4CBBB, HY BAMLH0A0HYM2, CCC & Lower BAMLH0A3HYC) as of the Monday 17 August close, the latest observation FRED has published, so this table runs one session behind the rest of this letter. One-day changes reference the Friday 14 August close, one-week changes the Monday 10 August close, and year-to-date the last 2025 observation. Widening (positive basis points) reads as stress. Narrowing reads as relief.

§ 06 — Digital Assets

Bitcoin barely moved through the equity selling. It closed 0.02% higher at US$64,495.85 on the day the Nasdaq fell 1.33%. Its link is historically closest to the Nasdaq, at about 0.5, so a flat close on such a day is worth recording. Ether closed near flat at US$1,913.38 and Solana rose 1.34% to US$76.97. Bitcoin has closed inside its US$63,000 to US$65,000 August band for two sessions since Monday voided Friday’s break. It remains down 26.29% for 2026.

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. Levels are FMP end-of-day closes for Tuesday 18 August. Daily moves compare with Monday, weekly with Tuesday 11 August, year-to-date with the 31 December 2025 close.

§ 07 — Metals & Energy

The metals fell with the stock market. Brent did not. Silver lost 3.31%, the table’s largest move, gold 1.19% and copper 1.87%. Gold’s fall came with the 2-year yield unchanged, so its usual rate driver explains none of it. A gold fall on a falling stock day also means no safety buying appeared, which fits the quiet stress readings elsewhere. Brent rose 0.17% to US$91.02, a second consecutive close above US$90 and its highest since 24 July, after the truce with Iran expired. The premium tracked here since 11 August stands. Its void condition, two consecutive closes below 87.72, was not approached. Natural gas rose 3.20%, the only other riser on the table.

§ 08 — Economic Calendar

US release times are Eastern. China’s loan prime rate fix is shown in Beijing timing. Japan’s July inflation prints Friday morning Tokyo time. Retailer report timing and EPS consensus are from the FMP earnings calendar. PMI consensus shows manufacturing / services. Consensus and priors are FMP-sourced.

The next two sessions test whether Tuesday’s caution was priced correctly. Wednesday afternoon brings the 20-year auction and the Fed minutes an hour apart. Target, Lowe’s and TJX report Wednesday morning and Walmart Thursday. Home Depot beat on Tuesday, earning US$4.92 per share against US$4.73 expected with comparable sales up 1.7%, kept its full-year outlook, and still closed 0.12% lower. July housing split: permits rose 5.0%, starts fell 12.4%. Japan’s July inflation prints Friday morning, China fixes loan rates Thursday, and the August PMI round closes the week Friday.

§ 09 — Macro Themes

1 · The gap at the top of the 2026 sector table widened sharply. Energy leads the year at 42.43% against technology’s 28.93%. The gap was 7.78 points on Monday and 13.50 at Tuesday’s close. The money that left technology bought sectors paid on this year’s cash flows: energy, health care, staples and financials.

2 · The chip stocks took the day’s largest losses, worldwide. Nvidia lost 2.34%, AMD 4.27% and TSMC’s US shares 4.07%, and technology fell 2.47%, the day’s worst sector. Tokyo, Seoul and Taipei fell hours earlier, and Seoul’s live Wednesday session opened sharply lower again.

3 · Wednesday tests the scare against actual demand. The 20-year sells with the market at 5.28%, about 12 basis points above July’s result, and the Fed minutes follow an hour later. Tuesday’s selling pressure eased by the close. The auction measures demand directly.

4 · The oil premium held through a quiet session. Brent’s 0.17% rise was small. The level is the point: US$91.02 is the highest close since 24 July and a second straight close above US$90, priced while the Iran truce lapsed with no replacement.

§ 10 — Analysis & Nuances

A fall with quiet stress readings is an allocation change, and Tuesday’s readings were quiet. The VIX closed at 15.84, below its 50-day average of 17.2. Credit spreads moved 6 basis points or less in Monday’s reading. Bitcoin barely moved against a historical Nasdaq link of about 0.5, and gold fell 1.19%. What moved was the ranking inside the stock market. Stocks valued on distant profits repriced to a long yield near 5.3%, and stocks paid on current cash flows were bought to 2026 highs. The selling tracked the morning rise in the 30-year and did not reverse when yields closed lower: the S&P 500 finished within 0.1% of its day low. The allocation is the signal, not the day’s yield direction. Wednesday’s 20-year auction tests it. A result near the market’s 5.28% keeps the rotation’s premise intact.

Scorecard. The KOSPI floor at 6,813.34 held Tuesday, with the close at 6,869.83. In live Wednesday trade the index was below the floor, and Friday’s close decides the test. The 2-year sits at 4.19%, nine basis points above the 4.10 line watched here, unmoved by Home Depot’s beat. Target and Walmart still report. The Brent void condition, two closes below 87.72, moved further away. New test: a 20-year auction result above 5.33% reads as weak demand, and one below 5.23% reads as demand returning.

FAIRCURVE · MARKET PULSE · 19 AUG 2026 · Data: Financial Modeling Prep and FRED (ICE BofA credit spreads). All figures reference the Tuesday 18 August 2026 session unless stated. Not investment advice. For informational use only.