US Stock Futures Slip After Wall Street Closes Lower on Iran Tensions and Oil Surge Above $90

US futures slipped Tuesday after the Dow and S&P 500 fell 0.5% Monday as Iran tensions drove Brent crude above $90 and pushed the 30-year Treasury yield to 5.31%, its highest since 2007, raising inflation and rate concerns.

US stock futures edged lower in Asian trading on Tuesday after Wall Street closed in the red, as renewed US-Iran tensions pushed oil prices higher and stoked inflation fears. By early hours, S&P 500 futures were down around 0.4%, Nasdaq 100 futures dropped about 0.8%, and Dow futures slipped 0.1%, following Monday’s declines of 0.5% for the Dow and S&P 500 and 0.3% for the Nasdaq.

Dow Falls 0.51%, S&P 500 Drops 0.52% as Oil Surges Above $90 and 30-Year Yield Hits 5.31% on Iran Tensions

On Monday, August 17, the Dow Jones Industrial Average fell 0.51% (about 273 points) to close near 53,460, the S&P 500 dropped 0.52% to around 7,745, and the Nasdaq Composite declined 0.31% to roughly 26,645. Energy was the only major S&P 500 sector to gain, rising 0.9%, as crude climbed more than $2 a barrel. Communications services and consumer staples were among the biggest decliners.

Brent crude settled up 2.65% at $90.87 a barrel on Monday and extended gains on Tuesday above $91. WTI crude rose about 2.55% to $84.50. President Donald Trump said the US would not extend a memorandum of understanding with Iran and threatened military action against Oman if it interfered with efforts related to the conflict, heightening uncertainty over the Strait of Hormuz—a key oil transit route that carries roughly one-fifth of global oil supplies. Iranian media reported the seizure of a UAE-owned oil tanker, and Tehran indicated a shift to a more offensive posture as a temporary ceasefire arrangement expired.

The oil jump lifted US Treasury yields, with the 30-year yield closing at 5.31%—its highest level since June 2007. The 10-year yield also rose. Higher energy costs raised concerns that sticky inflation could complicate the Federal Reserve’s path after it held rates steady at 3.50%–3.75% at its July 28-29 meeting (with three dissenters favoring a hike).

Markets React to Iran Escalation Risk as Oil Rally Fuels Inflation Fears and Higher Yields

Investors focused on the risk of further escalation in the US-Iran conflict disrupting oil flows through the Strait of Hormuz, which has already constrained supplies and driven prices higher. The sharp rise in crude fueled inflation worries at a time when recent US retail sales and employment data came in weaker than expected. Higher bond yields increased borrowing costs and pressured equity valuations, especially growth and rate-sensitive stocks. Energy shares benefited from the oil rally, but broader risk-off sentiment dominated as markets weighed the potential for prolonged higher energy prices against soft consumer data.

US-Iran Tensions Keep Oil Volatile as Soft Data and Divided Fed Leave Markets Sensitive to Energy Inflation

Tensions between the US and Iran have kept oil markets volatile for months, with the strategic waterway seeing restricted traffic and repeated threats of disruption. A temporary arrangement expired without a lasting deal, and rhetoric from both sides has intensified. Soft July retail sales and employment figures had already tempered expectations for aggressive Fed action, leaving markets sensitive to any inflation impulse from energy. The Fed’s last meeting left rates unchanged in a divided vote, underscoring internal debate over policy amid mixed economic signals.

Investors Watch Retail Earnings, Fed Minutes and Iran Developments for Next Market Moves

Investors will watch a busy slate of retail earnings this week, including reports from Walmart, Home Depot and Target, for clues on US consumer health after the soft July data. Federal Reserve meeting minutes due Wednesday will be scrutinized for insight into the rate debate. Any further developments on the Iran conflict, tanker movements through the Strait of Hormuz, or oil price spikes will remain key drivers for both equities and bonds.