NEW YORK — The Dow Jones Industrial Average rose by 1,125 points on Tuesday, March 31, 2026. Investors grew optimistic about a potential end to the Iran war.

The advance marked one of the larger point gains for the Dow in a single session, as buying activity spread across sectors throughout the trading day.

Not all market observers shared the optimism behind the rally. Garrett Melson of Natixis urged caution, saying, "I don't think this is a rally to really trust."

The Iran war has weighed on investor confidence for months, and Tuesday's surge came as even preliminary signals of a potential diplomatic breakthrough prompted broad buying activity across equities markets.

Whether the optimism holds in the sessions ahead will depend in part on how the geopolitical situation develops. Traders and portfolio managers will be watching for further indications that the conflict may be nearing its end.