Weimer is CEO of HypoVereinsbank, the Munich-based lender owned by Italy's UniCredit.
American ownership of exchange climbs with rejiggered bidding group.
Activist TCI claims Rolet is being forced out.
Clearing allows market makers to use their balance sheet more efficiently.
Activist TCI claims Rolet is being forced out
Saudi exchange wants to be sole listing agent for IPO.
MiFID II has stricter rules on data collection and proof of best execution.
Block trading is due to become more valuable under MiFID II.
The deal covers the clearing of derivatives for 10 years.