US-Iran Ceasefire Triggers Dollar Drop and Risk-On Market Shift

Global financial markets experienced a significant shift on April 8, 2026, as a two-week ceasefire between the United States and Iran triggered a broad relief rally. The announcement by President Donald Trump led to a sharp decline in the U.S. Dollar and a surge in risk assets, including stocks and bonds, as investors moved away from safe-haven trades.

The U.S. Dollar slumped on April 8, erasing the gains it had accumulated throughout 2026. According to the Bloomberg Dollar Spot Index, the currency weakened by 0.8% on Wednesday, marking its worst single day since January. The greenback fell against all 16 of its major peers, with the yen, pound, and euro each posting gains of 1% or more at one point during the session.

Equity Markets and Oil Price Response

Equity markets responded with immediate optimism following the ceasefire news. The S&P 500 closed up 2.5%, while the Nasdaq Composite rose 2.8%. The Russell 2000 surged 2.9%, and the Dow Jones Industrial Average jumped 1,325 points, representing its largest one-day percentage gain since April 2025.

The ceasefire also had a direct impact on energy markets. Oil prices tumbled sharply following the announcement, with expectations that gasoline prices would follow the downward trend. This decline was supported by pledges from Tehran to reopen critical pathways for global oil trade.

Economic Implications and Fed Expectations

The shift in market sentiment has altered expectations regarding U.S. Monetary policy. Prior to the ceasefire, inflation fears linked to the Middle East conflict had diminished the likelihood of interest rate cuts. However, traders have now increased expectations that the Federal Reserve will ease rates in the coming months.

Current money market data indicates a roughly one-in-four chance that the Federal Reserve will implement a quarter-point rate cut by the end of 2026. Analysts suggest these expectations could increase further if the decline in oil prices persists.

Analyst Perspectives and Risks

While the initial reaction was overwhelmingly positive, some financial experts have cautioned that the recovery may be premature. Krishna Guha, Evercore vice chairman and head of economics, noted in a Wednesday memo that the ceasefire could fall apart and warned that there will still be an initial inflation shock.

Strategists at JPMorgan Chase’s trading desk suggested the S&P 500 could continue to rise as euphoria returns to the markets. They noted that if the ceasefire is not a feint, markets are likely to treat it as a de facto end to the conflict, despite ongoing economic damage across various regions.

The durability of the agreement remains a point of contention. The initial market moves faded slightly in the Treasury market after a top Iranian official expressed doubt about the agreement’s longevity. An Iranian semiofficial news agency reported on April 8 that traffic was suspended in the Strait of Hormuz in response to Israeli attacks on Lebanon, although this news did not halt the drop in oil prices.

Market Drivers and Haven Trades

The dollar’s recent strength had been driven by its role as a safe asset and the perception that the U.S. Economy was better insulated against global energy shocks. The ceasefire effectively unwound this haven trade, as investors shifted capital back into riskier assets.

Here’s a pure relief rally, especially after the escalation early last week. It makes complete sense that markets outside the US are rallying more, given the disproportionate negative impacts of the war and energy price shocks.

Leah Traub, portfolio manager at Lord Abbett & Co.

Despite the market rebound, official statements from Washington and Tehran have not yet provided a clear outlook on the future of shipping traffic in the Strait of Hormuz, leaving some uncertainty regarding the long-term stability of global energy logistics.