Wednesday, September 30

August PCE inflation came in softer than expected, with headline prices rising 3.4% year over year and core PCE increasing 0.2% month over month. Markets accordingly cut the implied probability of an October Federal Reserve hike to roughly 35%–40%, from about 45% before the release.

New York Fed President John Williams reinforced that repricing, saying policymakers did not need to move urgently and that another increase could come later in the year. Two-year Treasury yields fell about two basis points to 4.868%.

The long end told a more consequential story. The 10-year yield held around 5.23%–5.25%, its highest level since June 2007, while the 30-year yield remained near a 2002 high. Heavy sovereign issuance, deteriorating government finances and renewed energy inflation are overwhelming the relief from softer near-term price data, leaving the curve as the clearest constraint on financial conditions.

Brent crude gained about 1% to $103.71 a barrel, while WTI rose 2.2% to $91.33. The move extended oil’s gains to roughly 40% for the quarter and 70% year to date, as the seven-month U.S.-Israeli war with Iran continued to raise concerns about energy supply.

That creates a direct collision with the day’s softer PCE signal. Lower core inflation reduced the perceived need for an October hike, but elevated crude prices threaten to keep headline inflation and inflation expectations under pressure. The energy shock is therefore reinforcing the bond market’s long-end selloff even as short-term rate expectations ease.

The conflict remains the principal geopolitical transmission channel into markets: oil is lifting inflation risk, government-bond yields and the cost of capital without yet forcing a broad equity liquidation.

AI and semiconductor shares led Japan’s Nikkei 225 1.94% higher to 66,753.72, while AI infrastructure investment was cited as a meaningful contributor to U.S. second-quarter growth. Technology and energy shares also outperformed in the United States, helping contain losses even as the S&P 500, Dow and Nasdaq finished lower.

The concentration is becoming more important than the headline index levels. The KOSPI, heavily exposed to chipmakers, fell nearly 20% during the quarter despite global equities remaining close to record highs. Major world indexes ended the quarter roughly 2% below their peaks but more than 12% higher for the year, showing how much performance remains tied to a narrow AI-led leadership group.

That dependence leaves the rally exposed to any disappointment in infrastructure spending or semiconductor demand, particularly with long-term yields and energy costs rising together.