World markets lost $3 trillion in the two days of trading following the United Kingdom's Brexit vote.
The U.K.'s vote Thursday to leave the European Union led to major sell-offs on Friday and Monday. Credit agencies, including Standard & Poor's and Fitch, downgraded the country's ratings. Moody's changed its outlook from "stable" to "negative."
"Fitch believes that Brexit represents a substantial negative shock to the U.K. economy, public finances and political continuity," said Ed Parker of Fitch Ratings.
Supporters react in favor of the Brexit vote:
But there was a glimmer of hope on Tuesday morning: U.S. stocks rose after the opening bell, and European markets saw a bounce.
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