New Delhi: A curious pattern has emerged from US President Donald Trump’s management of the Iran crisis. The greater the military tension, the deeper the damage to global markets. The stronger the signals of diplomacy, the faster investors return to risky assets.
Since the outbreak of the conflict in February 2026, financial markets have effectively become a real-time referendum on the chances of peace. Oil has swung from around $80 a barrel before the war to a peak of $126.41 during the worst phase of the crisis, before retreating below $80 as negotiations gathered momentum. Global equities have followed a similar trajectory, wiping out billions of dollars in market value during periods of escalation and recovering sharply with every indication that Washington and Tehran may be moving closer to an agreement.
There is no evidence that Trump is “deliberately delaying” a final peace agreement to create a series of stock market rallies. However, the way the negotiations have unfolded has generated a powerful political advantage: every ceasefire, every diplomatic framework and every incremental breakthrough has become a fresh catalyst for market optimism.
Fear Grips Markets
The initial reaction to the conflict was a classic flight from risk.
Before military action began, American equities were enjoying one of their strongest periods in recent years. The Dow Jones Industrial Average had crossed the 50,000 mark in early February, while the S&P 500 remained close to all-time highs, supported by enthusiasm surrounding AI and resilient corporate earnings.
The geopolitical landscape changed abruptly after US-led attacks on Iran and Tehran’s response, including the disruption of shipping through the Strait of Hormuz — a strategic passage responsible for nearly 20% of global crude oil movement.
The implications for investors were immediate. A prolonged disruption threatened higher transportation costs, accelerating inflation and the possibility that central banks would keep interest rates elevated for longer.
Within days, global stock markets turned defensive. The Dow dropped more than 400 points in early March, while major European and Asian benchmarks fell between 1% and 2% as investors shifted capital towards traditional safe-haven assets such as gold and the US dollar.
The pressure intensified as the crisis dragged on. By late March, Wall Street entered a deeper correction. On March 27, the Dow recorded a single-day loss of 793 points to close near 45,167. The S&P 500 declined 1.67%, while the technology-heavy Nasdaq fell 2.15%, leaving it more than 12% below its previous peak.
The market’s anxiety was closely linked to energy prices. Brent crude climbed beyond $112 a barrel by late March and eventually reached $126.41, fuelling fears that a second inflation shock could derail the global economic recovery. The US 10-year Treasury yield climbed to 4.46%, its highest level in months, as traders reassessed expectations of Federal Reserve rate cuts.
For investors, earnings forecasts and AI-driven valuations suddenly became secondary. The central question was whether the Middle East crisis would evolve into a prolonged disruption of global energy supplies.
Wall Street’s risk appetite surged as diplomatic “signals” cooled oil prices, with every step toward a deal erasing the geopolitical premium in crude. (Photo by Lo Lo on Unsplash)
Diplomacy Reprices Risk
The market narrative began to shift when the White House moved from war rhetoric towards negotiations.
Investors quickly discovered that they did not need a signed peace agreement to change their positioning. The mere possibility of de-escalation was enough to trigger a reversal in oil and equity trades.
Reports of back-channel communication between Washington and Tehran sparked early recoveries in equity futures. The S&P 500 and Nasdaq futures moved higher as investors began reducing their bets on an extended energy crisis.
The relationship between diplomacy and market sentiment became increasingly direct. Each statement suggesting progress in talks reduced the geopolitical premium built into crude prices and improved appetite for equities.
When indications emerged that the Strait of Hormuz could reopen and military operations were approaching a pause, Brent experienced one of its sharpest declines of the year, falling by about 11% in a single session to nearly $82 a barrel.
Equities responded immediately. Major US indexes recovered from earlier losses, with the Dow, S&P 500 and Nasdaq posting gains of around 0.6% to 0.7% as investors returned to growth stocks.
By April and May, the market had established a clear trading pattern: escalation benefited oil, defence companies and safe-haven assets; diplomacy supported technology stocks, airlines, consumer businesses and broader equity indexes.
Oil Controls Sentiment
The most important market indicator throughout the conflict was not a stock index but the price of crude.
At the height of the crisis, the surge in oil prices raised concerns of a renewed global inflation cycle. Governments were forced to deploy emergency measures, including the release of approximately 400 million barrels from strategic petroleum reserves by members of the International Energy Agency (IEA) to prevent a prolonged supply shock.
The turning point came as negotiations moved from preliminary discussions to a structured roadmap.
By late May, Brent had retreated to nearly $103 a barrel. The announcement of an interim peace framework in June accelerated the decline, triggering a broad rally in global equities. The S&P 500 recorded a 2.6% jump following the ceasefire agreement, while markets across Asia and Europe also advanced.
By June 22, optimism surrounding a 60-day pathway toward a comprehensive settlement had pushed Brent down to $79.07 a barrel, a fall of nearly 37% from its wartime high. The decline eased concerns over inflation, improved expectations for lower borrowing costs and encouraged investors to move back into equities.
The market’s message was straightforward: peace meant cheaper energy, lower inflation risks and stronger corporate profitability.
The Trump Factor
This is where geopolitics and political theatre begin to overlap.
Trump has repeatedly treated stock market performance as a measure of his economic leadership. A single, comprehensive peace agreement would deliver one major political victory. A phased process, however, offers several opportunities to showcase progress — the announcement of talks, temporary ceasefires, agreements on shipping routes, sanctions negotiations and eventually a final settlement.
That does not prove that the White House is intentionally stretching the diplomatic timeline. Such a strategy would carry substantial risks because markets can quickly punish failed negotiations. Any renewed attack on energy infrastructure, another blockade of Hormuz or a collapse in talks could rapidly push crude prices back above $100 and reverse the recovery in global equities.
A more convincing explanation is that Trump is following a familiar strategy of calculated uncertainty. By maintaining pressure on Iran while simultaneously presenting the possibility of peace, he retains negotiating leverage and keeps investors focused on the prospect of a favourable outcome.
The result is an unusual modern conflict where the battlefield extends beyond missiles and diplomacy into trading floors from New York to Mumbai. Every military escalation raises the cost of failure. Every diplomatic signal creates a new wave of optimism.
For now, Wall Street appears to have become an unofficial participant in the peace process — rewarding every step towards a settlement, even before the final agreement has been signed.
(Cover photo by Igor Omilaev on Unsplash)