Last Updated Mar 22, 2016 4:29 PM EDT
U.S. stocks ended little moved on Tuesday as the Nasdaq Composite Index rose for a fifth consecutive session and airline and other travel-related shares were hit as investors reacted to deadly explosions in Brussels.
Flights in and out of Brussels were canceled after the explosions at the Belgian capital's airport and a subway station killed at least 31 people and left more than 100 injured.
"Risk assets are hitting a rough patch today after a swatch of mixed data and saddening headlines has given investors reason to pause," Christopher Vecchio, currency analyst at DailyFX, emailed.
Comments from Republican front-runner Donald Trump drew a rebuke from the U.S. Travel Association.
"Words matter and move markets. It's just not realistic to ban religions, order war crimes, and end international travel," Roger Dow, president and CEO of the group, said in a statement. "Bombast and bluster are no substitutes for thoughtful leadership."
After the blasts in Brussels, the billionaire businessman reiterated his proposal for a crackdown on border security and repeated his prior support for using torture to gather information.
Facebook (FB) said it activated its Safety Check in Brussels. "Safety Check is a simple and easy way to say you're safe and check on others after a major disaster or crisis," a spokesperson for the social network emailed. "In 2015, more than 950 million people received a notification that a friend or loved one was safe in a crisis."
Major indexes fluctuated between gains and losses during the session.
The Dow Jones Industrial Average fell 41 points, or 0.2 percent at 17,583, with American Express (AXP) among the blue-chip shares weighing.
The S&P 500 index (SPX) fell 1.8 point, or 0.1 percent, to 2,050, with health leading gains and consumer staples falling the most among the gauges's 10 major sectors.
Erasing losses, the Nasdaq Composite rose 13 points, or 0.3 percent, to 4,822.