S7/10Economic

US stocks today: S&P 500 and Nasdaq hit record closing highs as US and Iran agree to extend ceasefire

The S&P 500 and Nasdaq hit record closing highs as hopes of a US Iran ceasefire extension boosted sentiment. Investors also digested US inflation rising to a three-year high and weaker GDP revision. AI and tech stocks led gains, with Microsoft, Snowflake, Eli Lilly and Marvell among top movers today.

28 May 2026, 20:05 UTCSource: Economic Times

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⚠️ This is a probabilistic forecast, not a guarantee. Accuracy is measured only on resolved scenarios; monitor confirmation indicators below.
A
Escalation45% model probability
Did not materialise

Confirmation indicators

  • Increased rhetoric from US officials regarding Iran's nuclear program.
  • Reports of increased oil tanker activity in the Persian Gulf region.
  • A significant drop in global energy prices (e.g., Brent crude falling below $80/barrel).
Horizon: 7–14 days
B
Status quo40% model probability
Did not materialise

Confirmation indicators

  • Increased rhetoric from US officials regarding Iran's nuclear program.
  • Reports of increased oil tanker activity in the Persian Gulf region.
  • A significant drop in global energy prices (e.g., Brent crude falling below $80/barrel).
Horizon: 7–14 days
C
De-escalation15% model probability
Did not materialise

Confirmation indicators

  • Increased rhetoric from US officials regarding Iran's nuclear program.
  • Reports of increased oil tanker activity in the Persian Gulf region.
  • A significant drop in global energy prices (e.g., Brent crude falling below $80/barrel).
Horizon: 7–14 days