Euronext Clearing has invited Clearstream to act as a tri-party collateral management agent for users of its repo clearing services As tri-party agent, Clearstream will custody, select, value, settle and substitute the collateral counterparties post to Euronext Clearing Euronext Clearing has embarked on a two-year plan to expand the scope and scale of its repo clearing services Clearstream will become a tri-party agent for users of Euronext Clearing, the central counterpart