The Dow Jones Industrial Average (NYSE: DJIA) closed at 52,766.88 on Tuesday, September 1, 2026, falling 419.02 points, or 0.79%, on the first trading day of the new month.

The decline followed Monday’s 0.7% drop of 374.09 points to 53,185.90, leaving the blue-chip index lower for a second consecutive session and well off its summer highs.

Trading Economics reported the index losing around 235 points at one stage during the session before losses deepened into the close, with selling pressure intensifying as the afternoon progressed.

Alphabet fell 2.21%, Nvidia dropped 2.03%, and Caterpillar declined 1.74%, making them the most prominent laggards among the 30-stock index’s components on the day.

Not every component finished in the red, with Merck advancing 1.84%, Johnson and Johnson adding 1.63%, and Chevron climbing 1.49% as crude oil prices surged sharply during the session.

Tuesday’s selloff traced directly to a fresh escalation in hostilities between the United States and Iran, with overnight reports confirming that two oil tankers had been struck by projectiles in the Strait of Hormuz.

One of the stricken vessels was Saudi-owned and the other South Korean-owned, reviving fears that a six-month conflict which had appeared to be locked in a stalemate was entering a more volatile phase.

The news sent Brent crude climbing toward $93 a barrel, adding a fresh layer of uncertainty to a market already grappling with a complicated interest-rate outlook heading into the fall.

Rising government bond yields compounded the pressure, with the benchmark 10-year US Treasury yield pushing toward 4.8%, its highest level since January 2025, while the 30-year yield climbed back toward 5.3%.

The move reflected growing conviction among investors that the Federal Reserve may need to raise interest rates at its September meeting, rather than cut them, following hawkish commentary from Fed Chair Kevin Warsh at the Jackson Hole symposium the previous week, in which he warned about persistently sticky inflation.

The CME FedWatch tool showed a 57.5% probability of a 25 basis point rate increase to a range of 3.75% to 4% following those remarks, representing a meaningful shift in market expectations relative to earlier in the year.

Amid the macro-driven selling, reports that John Ternus would succeed Tim Cook as chief executive of Apple drew notable investor attention, with shares of the iPhone maker rising on the news as a rare bright spot in the technology sector.

On the economic data front, the ISM Manufacturing Purchasing Managers’ Index fell to 54.6 in August, down from July’s near four-year high of 55.6 and below the consensus forecast of 55.2, signalling some loss of momentum in the industrial sector.

The ISM’s manufacturing prices-paid index came in at 71.1 for August, broadly in line with expectations, while the employment component eased to 51.2 from 52.8 the prior month, offering a mixed but still-resilient picture of US industry.

Despite Tuesday’s decline, the Dow remains within a relatively narrow band of its all-time highs, and investors have broadly characterised the pullback as a healthy repricing of risk rather than the beginning of a sustained downturn.

Looking ahead, Wednesday’s ADP employment report and Friday’s nonfarm payrolls release are both likely to shape near-term expectations for the Federal Reserve’s September policy decision in a meaningful way.

The path of the Strait of Hormuz conflict will be equally important for the index’s trajectory, given its direct bearing on energy prices, input costs, and the broader inflation outlook that the Fed is closely monitoring.

August and September have historically ranked among the seasonally weakest months for US equities, a pattern that, combined with rising yields and renewed geopolitical risk, suggests further volatility may lie ahead for Dow investors.