Wall Street Ends Lower as Yields and Oil Prices Mark a Shaky September Start

Indexes slide into historically weak month

U.S. equities opened September on a decisively negative note, with all three major indexes closing lower on Tuesday. The Dow Jones Industrial Average fell 413.41 points, or 0.78%, to 52,772.49; the S&P 500 lost 54.19 points, or 0.71%, to 7,631.95; and the Nasdaq Composite dropped 271.11 points, or 1.03%, to 26,099.77. The declines extended Monday's losses and arrived at a moment when September's reputation as the weakest month for equities was already on traders' minds.

Analysts attributed the session to a convergence of forces rather than any single headline. Renewed U.S. airstrikes against Iranian targets near the Strait of Hormuz drove Brent crude toward the mid-$90s per barrel, while sovereign debt yields across major economies climbed to multi-year highs. Federal Reserve Chair Kevin Warsh's hawkish remarks from Jackson Hole, combined with the energy shock, led markets to increase bets that the central bank will raise rates at its September 15–16 meeting.

Bond selloff deepens as rate-hike odds climb

The benchmark 10-year U.S. Treasury yield continued edging higher after reaching a 19-month peak on Monday, eventually pushing above 4.75%. Global yields moved in tandem: Japan's 10-year government bond yield hit its highest level since August 1996, and Germany's 10-year yield climbed to its highest point since 2011. The synchronized selloff reflected investors demanding higher compensation for inflation and fiscal risks even as they reduced equity exposure.

Fed funds futures implied roughly a 68% probability of a 25-basis-point rate hike at the September meeting, up from about 40% a week earlier, according to CME FedWatch data cited in market reports. The repricing followed Warsh's statement that summer inflation readings, while better than forecast, did not signal meaningful improvement in underlying trends.

Oil spike and geopolitical escalation

The U.S. launched a new barrage of airstrikes against Iranian targets around the Strait of Hormuz following Treasury Secretary Scott Bessent's remarks that Washington would probably announce new bank sanctions against Iran. Iran warned it would prevent oil exports from the Gulf. West Texas Intermediate crude for October delivery rose 5.2% to $90.22 per barrel, while Brent crude for November settled at $94.65, up 4.6%.

Energy was the only S&P 500 sector to finish higher, rising 1.54% to a fresh 52-week high, as the rest of the market priced in higher input costs and tighter financial conditions. Ross Mayfield, investment strategy analyst at Baird, described the combination of hawkish Fed commentary, military escalation, and rising oil as a perfect cocktail for a risk-off day in a market trading near all-time highs.

What traders watch next

The Labor Department's JOLTS report, released the same morning, showed 7.271 million job openings in July—below the 7.3 million forecast—adding to the day's cross-currents without resolving the inflation-versus-employment debate facing the Fed. Attention now turns to Friday's nonfarm payrolls report for August and the September 10 CPI release, both of which could shift rate expectations before the FOMC meeting.

September has historically been difficult for equities, particularly in election years when political uncertainty adds to seasonal headwinds. Whether the current selloff deepens or stabilises will depend largely on whether diplomatic efforts around the Hormuz corridor produce a credible de-escalation signal, and whether upcoming inflation data confirm or contradict the market's hawkish repricing.