Tech Pullback Drags S&P 500, Dow, Nasdaq Lower

U.S. equities declined across the board on Tuesday as a pullback in technology shares weighed on all three major indexes, with the S&P 500, Dow Jones Industrial Average, and Nasdaq Composite each finishing lower. The tech sector, which has driven much of the market's recent gains, led the retreat as investors reassessed valuations amid broader uncertainty. Geopolitical attention centered on developments in U.S.-Iran diplomacy, which added a secondary layer of caution to trading sentiment without producing a clear directional catalyst. The convergence of a tech-led selloff and unresolved diplomatic signals kept risk appetite subdued throughout the session. Traders will be watching whether tech stabilizes at current levels or extends the pullback, and whether progress on a U.S.-Iran agreement alters the oil price and broader risk landscape in subsequent sessions.