The US financial markets experienced a significant adjustment on September 23, 2026, as strong economic indicators triggered a broad reassessment of interest rate expectations and equity valuations. The preliminary S&P Global Composite PMI released at 9:45 AM Eastern Time jumped to 58.4, the highest level in approximately five years since July 2021, with the Manufacturing PMI at 57.0 and Services PMI at 58.7, both substantially exceeding market forecasts. In response to the robust economic data, US Treasury yields rose sharply across all maturities.
The 10-year Treasury yield exceeded 5.12%, reaching levels not seen since 2007, while the 2-year yield climbed to approximately 4.86%, the highest level since June 2024. The 30-year yield reached approximately 5.41%, also at 2007 levels. This yield curve experienced what analysts describe as bear steepening, with longer-term rates rising more significantly than shorter-term rates, suggesting market concerns about long-term inflation and fiscal policy.
The 5-year note auction on September 23 revealed weakening demand dynamics in the Treasury market. The $70 billion auction cleared at a high yield of 5.033%, representing a 3.1 basis point tail above the when-issued yield and a bid-to-cover ratio of only 2.21 times, indicating softer-than-expected demand for intermediate-term government debt. Equity markets responded negatively to the interest rate surge.
The S&P 500 fell 0.69% to 7,711.09, the Nasdaq Composite declined approximately 1.1% to 26,945.06, and the Russell 2000 fell approximately 1.5% to 2,847.38. The Dow Jones Industrial Average declined 0.68% to 51,510. The declines aligned precisely with interest rate sensitivity, with small-cap and technology stocks experiencing the largest losses.
The Volatility Index moved to the 14.82-15.35 range, up 4-8% from the previous day but still reflecting adjustment rather than panic selling. Market participants immediately elevated the probability of additional Federal Reserve rate hikes beyond the initial increase implemented on September 16. The CME FedWatch data suggested the market began pricing in scenarios of either one additional hike or potentially two rate hikes before year-end, compared to the previous expectation of a single additional increase.
This shifted the market narrative from whether rate hikes would continue to how long the tightening cycle would persist. Energy markets showed particular volatility during the session. Crude oil initially weakened to the low $99 range on expectations of US-Iran diplomatic progress and reports of Saudi Arabia preparing to resume Red Sea exports via the East-West Pipeline.
However, crude rebounded sharply during New York hours. According to Trading Economics data as of 7:00 JST on September 24, WTI crude stood at $92.659, up 2.36%, while Brent crude reached $103.358, up 4.14%. The rebound followed US Energy Information Administration weekly data showing gasoline inventories fell by 1.686 million barrels while crude inventories increased by 2.969 million barrels, contrary to market expectations for a 600,000-barrel decrease.
Precious metals weakened under the influence of rising real yields and dollar strength. Gold declined 1.70% to $4,290.19, silver fell 3.92% to $64.423, and platinum dropped 3.97% to $1,753.10. The US Dollar Index strengthened 0.51% to 101.115, with the dollar rising 0.86% for the week and 2.84% year-to-date.
The dollar-yen pair moved to 158.297 yen, a depreciation of the yen representing levels that prompted Japanese Finance Minister Satsuki Katayama to reaffirm readiness to intervene in currency markets. Global bond markets experienced synchronized yield increases. The UK 10-year yield rose 13.8 basis points, France's increased 13.7 basis points, Spain's climbed 13.4 basis points, Germany's rose 11.7 basis points, and Canada's advanced 12.4 basis points.
This coordinated global movement reflected overlapping economic factors, with the Eurozone's September flash PMI also exceeding expectations, suggesting the interest rate pressure extended beyond purely US-driven considerations. The underlying economic data supporting the strong PMI readings showed mixed signals for Fed policy. US consumer prices in August increased 3.4% year-on-year with headline inflation, while the core index excluding energy remained at 2.4%.
Energy prices surged 16.3% year-on-year, up from 14.7% in July. Producer prices accelerated to 5.4% year-on-year in August from 4.8% in July, indicating upstream inflationary pressures. The ISM Manufacturing Prices Index remained elevated at 71.1 with non-manufacturing at 72.6, suggesting companies continued passing rising input costs to customers.
The housing market showed signs of cooling as mortgage rates approached 7%. The MBA 30-year fixed mortgage rate rose 0.15 percentage points to 7.12% for the week ending September 18, well before the interest rate spike of September 23. Mortgage application volume declined 1.5% week-over-week, marking the second consecutive weekly decline.
Housing starts in August totaled 1.275 million units annualized, down 2.6% from the previous month, while building permits fell to 1.394 million units, down 2.7%. The labor market remained resilient despite economic headwinds. Non-farm payrolls increased by 162,000 in August, recovering from a 21,000 increase in July, with the unemployment rate holding steady at 4.1%.
However, wage growth of 3.1% year-over-year lagged headline inflation of 3.4%, resulting in negative real wage growth of approximately 0.3 percentage points. This dynamic contributed to a significant deterioration in consumer confidence, which fell to 47.8 in September from 51.7 the previous month, the lowest level reported in recent data. Fiscal and structural factors contributed to the elevated long-term interest rate environment.
The US government debt-to-GDP ratio stood at 123% as of end-2025, with large-scale fiscal deficits requiring substantial Treasury issuance. The trade deficit expanded to $88.58 billion in July from $71.18 billion in June, reflecting a 24% month-over-month increase. The money supply M2 reached a new statistical high of $23.343 trillion in August, increasing 0.54% from the previous month.
The broader context for rate developments included a global tightening cycle. The Federal Reserve raised rates by 0.25% on September 16 in a unanimous 12-0 vote, the first increase in three years and two months. The European Central Bank implemented a 0.25% rate increase in September with unanimous support, raising the deposit facility rate to 2.50%.
The Bank of England held rates steady but with three members voting for an increase to 4.00%. The Bank of Japan raised rates by 0.25% on September 18 in a 7-2 vote to approximately 1.25%. The South African Reserve Bank increased rates by 0.25% on September 23 to 7.25%.
Market analysts organized the outlook into three potential scenarios. A settling in the 5% range would occur if weak Treasury auction demand persisted and inflation remained elevated, with the market pricing in two additional Fed rate hikes for the year. A rebound scenario could develop if auction results improved and the Trump-Xi Jinping summit scheduled for September 24 confirmed an extension of the tariff truce, potentially bringing yields back to the 4.9% range.
A further rise scenario would materialize if oil prices increased substantially due to Middle East developments, potentially testing the 5.2-5.3% range and creating stagflation concerns. Cryptocurrency markets also succumbed to interest rate pressures. Bitcoin declined 2.05% to $84,421 on September 23, and Ethereum fell 2.69% to $2,678.56.
However, Bitcoin inflows into US spot ETFs showed substantial strength, with approximately $999 million in net inflows recorded on September 21, described as the largest single day in 2026 by Farside Investors. Year-to-date net inflows into spot Bitcoin ETFs remained modest at approximately $320 million, with spot Bitcoin ETF holdings reaching approximately 649,000 BTC.
Source: note.com