Stock market today: Dow, S&P 500, and Nasdaq climb amid Apple CEO change, Warsh hearing, Iran uncertainty

The S&P 500, Nasdaq, and Dow advanced as investors digested the implications of a leadership transition at Apple, testimony from central banker Warsh, and escalating geopolitical tensions involving Iran. The market reaction reflects a recalibration of risk appetite, with technology stocks—particularly Apple—drawing renewed investor interest on governance changes, while rising Iran-related supply disruption risks in energy markets prompted a modest flight to equities as a relative safe haven. The Nasdaq and S&P 500 are especially sensitive to shifts in tech sector sentiment and rate expectations influenced by Warsh’s hawkish or dovish signals, while broader stock indices face potential volatility from Middle East escalations affecting oil flows and inflation outlooks. Traders are now focused on the upcoming CPI inflation report, which will clarify whether recent geopolitical premium pricing is consistent with the Fed’s evolving rate path.

The Nasdaq-100 (NDX) is the US large-cap tech benchmark. NDX is more sensitive to rate decisions than SPX because of longer-duration cash flows, and heavily concentrated in Tech/Comms names — mega-cap earnings season dominates price action.

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