US stocks climbed Monday morning as traders held onto big AI-fueled gains and looked for positive developments in the Middle East conflict that would lead to lower oil prices. The S&P 500 Index climbed 0.2% at Tuesday's open, gaining for its fourth-straight session as the benchmark nears its first record since August. The Nasdaq 100 Index climbed 0.4%, adding to gains from Monday. The blue-chip Dow Jones Industrial Average was little changed.

The market's upward momentum reflects sustained confidence in AI-driven sectors and cautious optimism about geopolitical developments. Investors are watching closely for any signals that could push oil prices lower, which would further support equity gains.

Trading volume remained moderate as participants awaited additional economic data and updates from corporate earnings expected later in the week.