Major U.S. stock indexes ended near session lows on Tuesday as traders shied away from risky assets ahead of major political and economic headlines expected on Thursday.
Britain's general election as it maps its exit from the European Union, the European Central Bank's policy meeting and former FBI Director James Comey's testimony before a Senate panel could all affect investor sentiment.
Comey was investigating whether Donald Trump's presidential campaign and Russia colluded to sway the 2016 U.S. election when he was fired by Trump in May. His testimony could dampen already flagging momentum for the U.S. President's agenda of rolling back regulations and overhauling the tax code.
British Prime Minister Theresa May could increase her parliamentary majority, an opinion poll showed on Tuesday, shortly after another survey suggested the race with the opposition Labour Party was neck-and-neck.
Investors will also watch out for the European Central Bank's meeting, where policymakers are expected to take a more benign view of the economy, according to sources.
“We have a lot of stuff on Thursday. If you’re looking for days where we can see some long-awaited volatility, I'd say that's probably going to be Thursday and Friday," said Anthony Conroy, president at brokerage Abel Noser in New York.
"You got to position yourself to whatever could happen Thursday so you take a little bit off the table."
The Dow Jones Industrial Average <.DJI> fell 47.81 points, or 0.23 percent, to 21,136.23, the S&P 500 <.SPX> lost 6.77 points, or 0.28 percent, to 2,429.33 and the Nasdaq Composite <.IXIC> dropped 20.63 points, or 0.33 percent, to 6,275.06.
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Declining issues outnumbered advancing ones on the NYSE by a 1.19-to-1 ratio; on Nasdaq, a 1.62-to-1 ratio favored decliners.
The S&P 500 posted 28 new 52-week highs and 11 new lows; the Nasdaq Composite recorded 82 new highs and 70 new lows.
About 6.42 billion shares changed hands in U.S. exchanges, compared with the 6.6 billion daily average over the last 20 sessions.
(Reporting by Rodrigo Campos; Editing by Nick Zieminski)