Market Pulse — Tuesday, 18 August 2026

Global Cross-Asset Daily

The failed Iran talks showed up in two prices on Monday: oil and the longest Treasury yields. President Trump said he was in no hurry for a deal and threatened Oman. Brent rose 2.65% to US$90.87, its first close above US$90 since 29 July. The 30-year Treasury yield rose 6 basis points to 5.31%, its highest close of 2026 and a level last exceeded in June 2007. The S&P 500 fell 0.50%, with nine of eleven sectors down. Bitcoin rose 2.63% to US$64,486.25, back above the US$63,000 line it broke on Friday.

§ 01 — Equities · United States

All four US benchmarks fell on the day the 30-year Treasury set its 2026 high. The S&P 500 lost 0.50% to 7,746.97, a second daily decline since its 13 August record close. The VIX rose 6.60% to 15.19 and moved above its end-2025 level. The Dow fell 0.51% and is off 0.96% for the week, the weakest of the four. The Russell 2000 fell 0.35% to 3,057.54, ending its run of 2026-high closes at three sessions. It remains 2026’s strongest US index at +23.19% and had the best week, +1.33%.

§ 02 — S&P 500 Sector Map

Monday 17 Aug · sorted best to worst (1D)

Energy and technology rose. The other nine sectors fell. Energy gained 1.08% on the day and 3.99% on the week, both the best of the eleven, and its 2026 lead over technology widened to 7.78 points, at 39.97% against 32.19%. Technology’s 0.16% rise came as memory-chip makers extended their rally. Communications fell 1.89%, the day’s worst, and consumer staples lost 1.64%. Consumer discretionary, Home Depot’s sector, fell 1.23% on the day and 2.44% on the week, the weakest weekly figure for a second straight week, with those results due Tuesday.

Full table · sorted by YTD

§ 03 — Equities · Global

All figures reference Monday 17 August closes from FMP end-of-day data except Seoul: the Korean market was closed Monday for the Liberation Day substitute holiday, so KOSPI figures reference the Friday 14 August close, with no one-day change shown. One-day moves compare with the prior session, one-week moves with Monday 10 August, year-to-date with each market’s last 2025 close. Singapore’s weekly change is measured from Tuesday 11 August because that market was closed on 10 August.

Shanghai rose 1.41% hours after July retail sales, factory output and investment all missed forecasts. The index closed at 3,982.65, now 0.35% above its end-2025 level. Rising prices on weak data suggests investors expect policy support, with Thursday’s loan-rate fix the near test. Hong Kong rebounded 1.34% and is the table’s only market down for 2026, at -0.69%. The Nikkei added 0.76% and 3.36% on the week. Seoul was closed for the Liberation Day substitute holiday. The KOSPI resumes Tuesday at 6,977.94 with its 6,813.34 floor test open. Europe fell, the CAC 40 off 0.66% on the day and 1.68% on the week, the weakest of the European rows.

§ 04 — US Treasuries

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

No maturity fell on Monday, and the longest maturities rose most. The 30-year added 6 basis points to 5.31%, its highest close of 2026. Against the Federal Reserve’s daily series, which runs through Friday, that level was last exceeded on 12 June 2007. The 20-year reached 5.30%, also a 2026 high. Monday’s capital-flow release showed foreign purchases of US Treasury bonds and notes fell to US$6.8 billion in June from US$56.6 billion in May. One month’s reading, two months old, and the only direct measure of foreign demand this week. Over the week, maturities out to seven years yield less while the 20- and 30-year yield more. The gap between two-year and thirty-year yields is 112 basis points, twelve wider than a week ago. Three-month bills still yield less than two-year notes, so the priced path remains fewer increases, not cuts.

§ 05 — Credit Spreads

The weakest borrowers’ premium fell in the latest reading. Thirty-year Treasury yields rose the same day. Spreads on CCC-rated debt narrowed 12 basis points to 1,012 in Friday’s observation, reversing Thursday’s 4-point widening. High yield narrowed 4 to 267 and is 14 basis points tighter for 2026. Investment grade sits at 80. Credit prices default risk from intermediate maturities, so a 30-year repricing need not touch it. Spreads narrowing while long yields rose says the Treasury selling is about supply and inflation, not borrower health.

Credit spreads are FRED ICE BofA option-adjusted spreads (IG BAMLC0A0CM, BBB BAMLC0A4CBBB, HY BAMLH0A0HYM2, CCC & Lower BAMLH0A3HYC) as of the Friday 14 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 Thursday 13 August close, one-week changes the Friday 7 August close, and year-to-date the last 2025 observation. Widening (positive basis points) reads as stress. Narrowing reads as relief.

§ 06 — Digital Assets

Friday’s band break did not hold. Bitcoin rose 2.63% on Monday to US$64,486.25, back inside the US$63,000 to US$65,000 range it had broken on Friday. Weekend closes sat on either side of the line. The condition this letter set, a close above US$63,000 by Friday, was met on the first weekday, so the break reads as noise rather than a trend change. The rebound came on a day US equities fell, against bitcoin’s usual pattern of tracking the Nasdaq closest, at about 0.5. Ether gained 2.05% to US$1,912.48 and Solana 1.93% to US$75.98. Bitcoin remains down 26.30% 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 Monday 17 August. Daily moves compare with Sunday, weekly with Monday 10 August, year-to-date with the 31 December 2025 close.

§ 07 — Metals & Energy

Brent closed above US$90 for the first time since 29 July. Brent rose 2.65% to US$90.87 and WTI 2.55% to US$84.50 after the Oman threat. The strait premium tracked here since 11 August widened instead of unwinding. Its void condition, two consecutive closes below 87.72, is not close to being met. Gold added 0.82% to US$4,473.70, 3.05% above its end-2025 close, rising even though the short-maturity yields it usually prices off barely moved. Natural gas fell 1.57% and is the table’s weakest commodity for 2026, down 27.02%.

§ 08 — Economic Calendar

US release times are Eastern. China’s loan prime rate fix is shown in Beijing timing. Retailer result dates and EPS consensus are from the FMP earnings calendar; no before-open or after-close timing is implied. PMI consensus shows manufacturing / services. Consensus and priors are FMP-sourced.

Wednesday stacks the Fed minutes and the 20-year auction into one afternoon. Home Depot reports Tuesday, Target Wednesday and Walmart Thursday, the week’s read on the US consumer. US housing starts land Tuesday, UK inflation Wednesday, China’s loan-rate fix Thursday, and the August PMI round closes the week Friday.

§ 09 — Macro Themes

1 · The Iran risk is priced in oil again. Brent’s close back above US$90 followed the Oman threat and the no-hurry line on the talks. Energy was Monday’s best sector and leads 2026 at 39.97%. The premium’s void condition, two closes below 87.72, stands untouched.

2 · Wednesday’s sale tests bond demand with the 30-year at its highest since 2007. June’s capital-flow data showed foreign buying of US Treasury bonds and notes nearly stopped. The 20-year sells Wednesday with the market 14 basis points above the yield at July’s sale. The Fed minutes follow an hour later.

3 · The two consumers moved apart on Monday. China’s July retail sales grew 0.6% against 1.5% expected, with factory output and investment also short. US surveys beat the same morning: Empire manufacturing at 20.6 against 11 expected, and homebuilder confidence rose. Home Depot, Target and Walmart report on the US shopper next.

4 · Chips held technology up while nine sectors fell. Memory-chip makers extended their rally and kept the sector positive on Monday. Seoul, where the memory trade is concentrated, was closed for a holiday. The KOSPI’s floor test at 6,813.34 resumes Tuesday from 6,977.94, up 65.58% for 2026.

§ 10 — Analysis & Nuances

The week’s question is who buys thirty-year Treasuries at these yields, and Monday sharpened it. Oil reaches equities directly: it raises fuel costs and lifts energy earnings, which is why that sector rose on a falling day. The 30-year at 5.31% works through the discount: higher long yields lower the present value of distant profits. Yields rose on a morning when both US surveys beat forecasts, so weak data was not driving the selling. The timing points at oil. The Treasury sells 20-year bonds into this market Wednesday, with June’s foreign-demand reading close to zero. An auction yield above the 5.30 the market already charges would say buyers demand a further discount. A result well inside it would say demand returns and the supply story cools.

Scorecard. The bitcoin test resolved on the first weekday: a close above US$63,000 by Friday was required, and Monday delivered 64,486.25, so the band break is void. The KOSPI floor at 6,813.34 went untested with Seoul closed and now runs to Friday. The 2-year sits at 4.19%, nine basis points above the 4.10 line watched here, with the first retailer guidance landing Tuesday. New test: the 20-year auction against the market’s 5.30.

FAIRCURVE · MARKET PULSE · 18 AUG 2026 · Data: Financial Modeling Prep and FRED (ICE BofA credit spreads). All figures reference the Monday 17 August 2026 session unless stated. Not investment advice. For informational use only.