But Jeff Chung, director of USBX Advisory Services, told Fleet Owner that he doesn't think transportation stocks will be adversely affected.
"I think publicly held transportation companies won't be affected any worse or better than what the market is experiencing now," Chung said. "They will follow the general market trend."
However, Chung said he believes another terrorist attack on the U.S. would cause adverse stock price effects for the freight transportation community.
"That would really hurt them," Chung said. "But the biggest issue facing transportation may be the overall cost of security measures, and if such measures lengthen delivery times for freight."