SPY closed Monday May 18 at 738.65, -0.07% from Friday's 739.17. Massive verified open 739.83 / close 738.65 / high 741.42 / low 733.39 / volume 47.84M. Far better than the Monday-morning Polymarket 6% Up-open probability implied - the cash session integrated the Sunday escalation plus the afternoon Trump de-escalation and ended near flat.
Provenance — node opacity = source trust
- Evidence Strength
Strong- Evidence Observed At
- May 18, 2026 · 8:00 PM UTC
- Citation
- https://www.bloomberg.com/news/articles/2026-05-17/oil-climbs-as-iran-war-shows-no-sign-of-ending-markets-wrap
- Citation Source
bloomberg- About Security
SPDR S&P 500 ETF- Market Metric
Close Price- Observed Value
- 738.65