UPDATE 1-U.S. federal grand jury indicts 'flash crash' trader
September 03, 2015 at 16:50 PM EDT
WASHINGTON, Sept 3 (Reuters) - London day trader Navinder Sarao has been formally indicted by a U.S. federal grand jury on charges of market manipulation that prosecutors say helped contribute to the 2010 "flash crash," according to a Sept. 2 court filing made public on Thursday.
