Iran warns of 100-day war with Israel, threatens US assets

Iran's armed forces announced Monday they are prepared for a long-term confrontation with Israel and ready to strike US interests in the region, threatening to unravel a fragile ceasefire and disrupt oil flows through the Strait of Hormuz.

"Iran is ready for a long-term confrontation with Israel and prepared to strike US interests in the region again," a military source told Tasnim News Agency, Iran's state-affiliated outlet.

The statement comes after the conflict, which began Feb. 28 when the US and Israel initiated military action against Iran, has stretched past 100 days. Missile exchanges between Israel and Iran and attacks on a US military base in Saudi Arabia marked the most serious escalation before a ceasefire took hold roughly two months ago. That truce had reduced the immediate risk of a broader regional war, but Monday's announcement suggests restraint may be ending.

For global markets, the risk is concentrated in energy prices. The Strait of Hormuz handles about 21% of global oil trade, and any disruption could push crude prices higher. During the last major Iran-Israel confrontation in April, Brent crude spiked more than 5% in a single session before settling higher. Gold and the US dollar have already attracted safe-haven flows, while equity indices face headwinds from an elevated geopolitical risk premium.

The announcement signals that the ceasefire has not resolved the underlying tensions. Iran's willingness to target US assets — a threat it has made good on previously during this conflict — raises the stakes for Washington, which maintains military bases across the Middle East including in Saudi Arabia, the UAE, and Qatar. Any attack on American personnel or assets would likely trigger a US response, escalating the conflict further.

On prediction markets, the probability of Iran's regime surviving the current conflict stands at 97.8%, according to Polymarket data, suggesting traders see the Islamic Republic as durable despite sustained military pressure. That resilience may embolden Tehran to maintain its confrontational posture rather than seek a diplomatic off-ramp. The regime has weathered previous rounds of sanctions and military pressure, giving it confidence in its staying power.

For investors, the key variable is whether the conflict disrupts oil supply. The last time Iran directly threatened shipping in the Strait of Hormuz was in 2019, when crude prices jumped about 15% over a two-week period before stabilizing after the US deployed additional naval assets. A similar disruption today would compound inflationary pressures that major central banks are still working to contain, potentially delaying rate cuts that markets have priced in for the second half of 2026. The Federal Reserve, European Central Bank, and Bank of England have all signaled a cautious approach to easing, and an oil price shock would reinforce that stance.

The US dollar index has strengthened as investors rotate into safe-haven assets, while gold prices have held above recent support levels. Equity markets in Asia and Europe — which have greater exposure to Middle East energy imports — face more pronounced downside risk than US benchmarks. The S&P 500's energy sector has outperformed the broader index as oil prices reflect a higher risk premium, while defense contractors including Lockheed Martin Corp. and RTX Corp. have also attracted bids on expectations of sustained military spending. The VIX, Wall Street's fear gauge, has edged higher as options traders price in a greater probability of sharp moves.

The next flashpoint to watch is whether Iran follows through on its threat to strike US interests. Any attack would likely trigger a US response, escalating the conflict further and pushing oil prices higher. Absent that, the situation may remain in a state of heightened alert — enough to keep a floor under crude and safe-haven assets, but not enough to trigger a full-blown risk-off move. The coming days will determine whether this is posturing or a prelude to a new phase of the conflict.

This article is for informational purposes only and does not constitute investment advice.