Bank Of Japan Governor Haruhiko Kuroda Speaks at the Nikkei Symposium [Getty Images]

Haruhiko Kuroda, governor of the Bank of Japan (BOJ), delivers the keynote speech at the Nikkei Symposium in Tokyo, Japan, on Monday, Sept. 3, 2018. Measures are needed to ensure high frequency trading doesnt simply result in transaction speed competition that risks amplifying price changes, said Kuroda at event to mark 30th anniversary of stock index futures. Photographer: Kiyoshi Ota/Bloomberg via Getty Images

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