Stock market today: S&P 500, Nasdaq, Dow futures climb as a halt to US-Iranian attacks is called

Geopolitical risk abatement centered on US-Iran de-escalation talks triggered broad-based equity strength across major indices. The removal of acute military conflict premium from market pricing benefits risk-on assets disproportionately, lifting both large-cap and technology sectors. This represents a fundamental shift in tail-risk perception rather than earnings-driven appreciation.

Technology and growth equities, particularly AAPL, NVDA, and semiconductor names, exhibit outsized sensitivity to geopolitical stability due to supply-chain exposure in contested regions and lower discount-rate sensitivity when risk sentiment improves. The Nasdaq advance typically outpaces broader indices during de-risking episodes, reflecting flight-to-quality reversal dynamics.

Energy sector exposure normalizes as oil-risk premium contracts with reduced Middle East tension prospects. Financial services benefit from lower volatility regimes and improved liquidity conditions. This move carries high correlation with S&P 500 directional momentum, indicating broad institutional repositioning rather than sector-specific catalysts.

Sector implication: The rally suggests macroeconomic backdrop stabilization without fundamental earnings revision, positioning as classic risk-on rotation. Defensive sectors may underperform near-term while volatility contraction persists, though tail-risk hedges remain prudent given geopolitical complexity.