The Dow Jones Industrial Average closed at a record on Wednesday, its first new high in nine months, as the index notched its fourth straight session of gains.

The Dow industrials climbed more than 170 points during a shortened trading session ahead of Thursday’s Independence Day holiday, putting it above its previous October milestone. The Dow was the last of the three major indexes to notch a record this year, as trade tensions, concerns of slowing economic growth and problems among individual companies such as Boeing and 3M weighed on its performance in recent months.

Last weekend's trade truce spurred the latest leg of the Dow's recovery after the U.S. and China reached a pact that eased investors’ fears of an all-out trade war between the world’s two biggest economies. But the cease-fire only put additional tariffs on hold indefinitely, leaving investors concerned that lingering frictions could give way to another flare-up in trade tensions and market volatility.