Donald Trump represents an unknown variable that tends to provoke anxiety among investors, analyst Chris Krueger said Monday.
Krueger said Trump's proposed tariffs are among the most controversial issues with investors. If the Republican presidential nominee were to win the election, there would be little stopping him from immediately enacting sweeping reform, he added.
"The market doesn't like uncertainty. With Trump, that is what you get almost by definition," Krueger said. "If he wants to do the 45 percent tariff on Chinese imports on Day One, that's something he can do."