(Bloomberg) -- U.S. stocks were poised to end a nine-day slide, with the S&P 500 Index on track for the strongest rally in four months amid speculation that Hillary Clinton's prospects in the presidential election were boosted after the FBI reiterated her handling of e-mails wasn't a crime.

Banks, technology companies and drugmakers paced the early rebound, with lenders headed toward their biggest one-day gain since August. JPMorgan Chase and Microsoft advanced more than 2.3%, while Biogen climbed the most in three months.

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