The U.S. stock market took a sharp dive Friday following news that the FBI was investigating some newly discovered emails tied to Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonButtigieg stands in as Pence for Harris's debate practice Senate GOP sees early Supreme Court vote as political booster shot Poll: 51 percent of voters want to abolish the electoral college MORE.

All three major stock indices dropped into negative territory immediately after House Oversight Committee Chairman Jason Chaffetz Jason ChaffetzThe myth of the conservative bestseller Elijah Cummings, Democratic chairman and powerful Trump critic, dies at 68 House Oversight panel demands DeVos turn over personal email records MORE (R-Utah) announced that FBI Director James Comey had informed him that the bureau had found some emails pertinent to its prior investigation into Clinton’s personal email server.

The market appears to be reacting to the new Clinton email news -- both the S&P and Dow just took a major leg down. pic.twitter.com/H5gPsJr4Vu — Steve Kopack (@SteveKopack) October 28, 2016

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The Dow Jones Industrial Average, Nasdaq and S&P 500 had all been in positive territory just before the news broke, with the Dow up roughly 80 points. Minutes after news of the fresh probe emerged, the Dow was down over 50 points.

Similarly, the Mexican peso suffered significant losses after the news broke, with the currency losing roughly 1.5 percent of its value compared to the U.S. dollar in the minutes after the news broke. The peso has emerged as a market predictor of sorts for the presidential race, given Republican nominee Donald Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE's vow to crack down on trade with Mexico and build a wall along the southern border he says will be paid for by the U.S.'s southern neighbor.

In a letter sent to Congress, Comey said that in investigating an “unrelated case,” his team had discovered “emails that appear to be pertinent to the investigation.” As such, the FBI was now reviewing those emails to determine if they contained classified information. Comey had previously closed the FBI’s investigation into Clinton’s use of a private email server while Secretary of State, concluding she did not break the law.

He said he could not predict if the emails were significant or how long the probe could take. But the Trump campaign was quick to react positively to the news.

“A great day in our campaign just got even better. FBI reviewing new emails in Clinton probe @CNNPolitics,” tweeted Trump campaign manager Kellyanne Conway.