Previously, he was CEO of DIFX (now called NASDAQ Dubai) and was a member of the DIFX board. Singer filled the position vacated by Per E. Larsson, who accepted another senior position in the region. Singer was appointed DIFX CEO effective July 1, 2008. 
Singer joined the DIFX from NASDAQ OMX where he was senior vice president and head of international, responsible for NASDAQ’s global business development with a primary role of managing international relationships with companies outside of the Americas.
JLN News Feed
CME to pay $3.5m over leak of secret trade data; Ex-BoE deputy governor fears ‘utter mayhem’ from clearing house reform
Delisting of Class A Common Stock, Units and Warrants of Rosehill Resources Inc. from The Nasdaq Stock Market
[JPX,TSE,OSE,TOCOMTrading Overview in July 2020]
[JPXConsolidated financial results for the fiscal year ended June 30, 2020 (Based on IFRS), unaudited]
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