MADRID :Spain's ACS and BlackRock's Global Infrastructure Partners have created a joint venture to develop an initial 2 billion euro ($2.33 billion), 1.7 gigawatt portfolio of data centres, the Spanish company said on Friday. Both companies will have a 50 per cent stake in the joint venture, ACS said. The transaction will provide ACS a 100 million capital gain, it added. The new development platform will include the existing portfolio of data centre assets ACS is developing across Europe, the U.