(REUTERS) Stock prices around the world declined on Monday ahead of the first U.S. presidential debate between Hillary Clinton and Donald Trump, while oil prices rose in advance of an informal OPEC meeting in Algeria on hopes for an output cut.
Half of America's likely voters will rely on the presidential debates to help them make their choice between the two major U.S. party nominees in the Nov. 8 election, according to a Reuters/Ipsos poll released on Monday.
"The polls have both candidates neck-to-neck. The debates might increase the lead of one over the other and that's what the market is fearful of," said Peter Cardillo, chief market economist at First Standard Financial in New York.
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