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Geopolitical tensions simmer as US rejects Iran’s latest proposal — May 18 markets recap

Geopolitical tensions simmer as US rejects Iran’s latest proposal — May 18 markets recap
TRADING NEWS TERMINAL · BLOGGeopolitical tensions simmer as US rejects Iran’s latest proposal —May 18 markets recapGeopolitics & riskVIXGOLDOILMay 18, 2026

What moved the wire

Diplomatic efforts to de-escalate tensions between the U.S. and Iran remained at a standstill after senior American officials dismissed Iran’s most recent peace proposal as insufficient. According to Axios, a U.S. senior official stated that Iran’s updated proposal for ending the conflict does not represent a meaningful improvement and remains inadequate for a deal. The rejection comes ahead of a high-level Situation Room meeting on Tuesday, with reports indicating growing impatience in Washington.

Iran has responded through a source close to its negotiation team, who told Iranian news agency TASNIM that despite some changes in the U.S. position, “substantive differences stemming from the Americans’ greed and lack of realism remain.” The source emphasized that Iran will not concede on its firm positions, including the return of frozen assets, and denied U.S. allegations about its nuclear ambitions, calling them “political excuses” and “deception.” Turkey’s foreign minister urged both sides to find common ground through dialogue and stressed the importance of maintaining ceasefire efforts, warning of the risks of renewed conflict.

Theme
🌍 GEOPOLITICS
Geopolitics & risk
Headlines
249
last 24h
HIGH-impact
96
across all sources
Top asset
IRAN
net -23

Asset reaction

Geopolitical risk sentiment remained cautious, with Iran-linked developments drawing strong market attention. Iranian assets saw net bullish pressure despite the diplomatic stalemate, possibly reflecting positioning ahead of potential escalation or speculative interest in a breakthrough. In contrast, broader Middle East risk indicators leaned bearish, as did sentiment around Israel, suggesting investor wariness over regional spillover. Sanctions-related themes trended negative, aligning with expectations of tighter measures. While Russia saw nearly balanced sentiment, joint nuclear drills with Belarus introduced a new layer of strategic concern. The nuclear theme itself registered modest bullish momentum, likely tied to renewed rhetoric.

Oil markets reacted to both supply-route updates and war-related economic impacts. Reports indicated that tankers entering the Strait of Hormuz during the Iran conflict are now exiting, a signal that immediate disruption fears may be easing. However, one report cited a $25 billion cost to global businesses from the ongoing oil shock linked to U.S.-Israel-Iran tensions, reinforcing the macroeconomic toll. The expiration of a Russian oil waiver under the current administration may further influence energy flows, though direct market reactions were muted within the 24-hour window.

Net asset impact this week (green=bullish, red=bearish)NET IMPACTIRAN-23ISRAEL-31SANCTIONS-25MIDEAST-22WAR-15TRUMP-15UKRAINE-9NUCLEAR+6RUSSIA+2LEBANON-7

Headlines that drove the session

Impact distributionHIGH: 96MEDIUM: 153249TOTALHIGH96 · 39%MEDIUM153 · 61%

Trade the follow-through

With the U.S. and Iran at odds over the adequacy of peace proposals and regional military activity persisting, traders should monitor for updates ahead of Tuesday’s Situation Room meeting. The rejection of Iran’s offer, combined with the expiration of a Russian oil waiver and Belarus-Russia nuclear drills, suggests volatility may persist in energy and defense-linked assets. Watch for shifts in tanker movements, official statements from the EU or Turkey, and any signals of movement in frozen asset negotiations.

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