Wall Street Ticks Up on Iran Talks; Nasdaq Logs Ninth Day

Major U.S. stock indexes closed higher on Tuesday after reports of progress in negotiations related to Iran that lifted investor appetite for risk. The Nasdaq posted its ninth straight daily gain.

The S&P 500 and the Dow Jones Industrial Average finished the session higher. Gains were concentrated in large-cap technology names and broad-market benchmarks, while industrial and consumer stocks also advanced.

Traders moved into riskier assets following updates on talks involving Iran. Investors cited possible effects on oil markets, shipping security and defense spending as reasons for shifting positions.

Market internals showed broad participation across sectors. Technology companies drove much of the Nasdaq advance, and investors increased exposure to cyclical stocks that tend to benefit from steadier trade and shipping conditions if tensions ease.

Market participants also paid attention to upcoming economic data, corporate earnings and central bank commentary. New economic releases and any official confirmations of diplomatic progress are likely to affect short-term market direction.

The gains follow months of volatility tied to tensions in the Middle East and concerns about disruptions to energy flows and global supply chains. Traders noted markets can swing quickly on fresh developments and that formal, verified agreements are required before some risks recede.