"I don't think she knocked him out because the market would be indicating a lot higher," said Dan Veru, chief investment officer at Palisade Capital Management.
"I think people don't care about what Trump said and they do care about Clinton's policies," he said. "It seems clear what she says and what she does are two different things."
On Friday, excerpts from documents posted online by WikiLeaks portrayed Clinton as more comfortable with Wall Street and free trade policies than she has indicated in her public campaign speeches. Meanwhile, a leaked video from 2005 of Trump's vulgar remarks about women stirred uproar around the Republican candidate's presidential campaign.
The Mexican peso, seen by many as a proxy on the market view of the U.S. presidential election, gained against the U.S. dollar on the news. On Sunday, the peso briefly traded as much as 2 percent stronger against the U.S. dollar before trimming gains to levels from before the debate.
"I think Trump did better in this debate than he did in the first debate," said Carl Forcheski, director of corporate FX sales at Societe Generale.
"I don't think the debate was a huge game changer but it got a little personal and a little dragged down into the mud a bit but not as much as I was expecting," he said.