FILE - In this March 23, 2016 file photo, British futures trader Navinder Singh Sarao leaves after the ruling in his extradition hearing at Westminster Magistrates Court in London. Singh Sarao has indicated that he'll plead guilty during his first appearance in a U.S. court Wednesday, Nov. 9, 2016, in Chicago. His four appearance comes six years after he allegedly helped trigger a 2010 "flash crash" from his parents' suburban London home that wiped tens of billions of dollars off the value of U.S. stocks. (AP Photo/Matt Dunham, File)
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