Market Implications of Escalating U.S.– Iran Conflict

On February 28, the United States and Israel carried out coordinated military strikes inside Iran, marking a significant shift from years of indirect confrontation to open military engagement. President Donald Trump confirmed that U.S. forces are participating in sustained combat operations alongside Israel, with stated objectives that include weakening Iran’s missile capabilities, preventing nuclear redevelopment, and increasing pressure on the regime.

While conflict in the Middle East is not new, this development represents a meaningful escalation. Markets are responding not simply to the presence of war, but to the fact that several long-standing thresholds have now been crossed—expanding the range of possible geopolitical and economic outcomes in the near term.

The joint strikes reportedly targeted missile infrastructure, military installations, and regime-linked facilities in Tehran and other key cities. The Pentagon has characterized the campaign as ongoing rather than symbolic, signaling broader strategic aims. Iran has responded with ballistic missile launches toward Israel and U.S.-aligned assets in the region. Air defense activity has intensified across Israel and parts of the Gulf, and some countries hosting U.S. bases have temporarily closed airspace or rerouted flights.

For investors, the most important shift is that the U.S. has moved from deterrence to direct confrontation.

Key Variables to Watch

From here, market direction will depend less on U.S. intent, which is now clear, and more on how Iran chooses to respond.

Scope of retaliation
Iran has a range of response options, from contained missile exchanges to broader attacks on U.S. regional assets or partners. Escalation risk rises with the breadth and persistence of those actions.

Energy infrastructure and shipping
A full closure of the Strait of Hormuz remains unlikely, but even partial disruptions, shipping harassment, or attacks on energy facilities could introduce significant volatility in oil markets and raise global risk premiums.

Duration of military operations
The effectiveness of the initial strikes will shape what comes next. If Iran’s capabilities are not meaningfully degraded, follow-on operations could extend the timeline and uncertainty.

Near-Term Market Implications

Markets are likely to maintain a risk-off posture in the short run, driven primarily by energy uncertainty and geopolitical risk rather than immediate economic deterioration.

• Energy: Oil prices carry asymmetric upside risk. Even without a direct supply shock, higher insurance costs, disrupted shipping, and elevated geopolitical premiums can materially influence prices.
• Inflation and policy: A sustained energy spike would complicate the disinflation trend and could reinforce central bank caution, even amid softer growth conditions.
• Risk assets: Equity and credit markets may remain volatile until there is clearer evidence that the conflict is stabilizing rather than widening.

From a longer-term perspective, the U.S. decision to strike Iran directly has temporarily shifted markets into an environment where tail risks carry greater weight than baseline expectations. While a full-scale regional war remains unlikely in our view, the range of potential outcomes has widened.

Investors should focus less on headlines and more on practical indicators of escalation, how Iran targets its responses, whether energy infrastructure is disrupted, and whether either side signals limits or prepares for prolonged engagement.

Geopolitical uncertainty can cause short-term market volatility, but the stock market has been resilient. In fact, stocks generated positive performance one year after an act of aggression for 73% of the armed conflicts since World War II. The longer the investment time frame, the more likely a positive return.

We will continue to monitor developments closely and assess both the risks and opportunities that emerge as events unfold.