Renewed US-Iran tensions are weighing on broad equity markets, with the S&P 500 selling off as geopolitical risk premium gets priced back in. Oil has jumped on supply-disruption fears given Iran's position in the Strait of Hormuz corridor, while technology stocks — the most rate-sensitive and growth-dependent corner of the market — are taking the hardest hit.

This is a textbook geopolitical shock pattern: energy names rally on the crude spike, defensives (utilities, staples) hold relatively firm, and high-multiple growth stocks reprice lower as risk appetite contracts. No single company is the focus here — the story is about sector rotation and index-level pressure.

The key tension is duration: geopolitical flare-ups historically produce sharp but short-lived equity dislocations, meaning aggressive shorts on the index often get squeezed once tensions de-escalate. The oil bid, however, can persist longer if physical supply routes are genuinely threatened.

What to watch: any diplomatic signals from Washington or Tehran, crude inventory data, and whether tech leadership reasserts itself on any ceasefire or de-escalation headline. The speed and severity of any reversal will depend on whether this escalates into kinetic conflict or remains a posturing episode.