The practice will now draw up detailed designs of its proposals for the new Shenzhen Stock Exchange tower.
The scheme follows in the footsteps of OMA's similarly extraordinary CCTV Building in Beijing.
The key move in the Shenzhen building is what is described as the 'floating base', which has been 'edged up' the building to become a platform, transforming the area below.
'Lifting the base in the air vastly increases its exposure; in its elevated position, it can 'broadcast' the activities of the stock market to the entire city,' Koolhaas said.
'The essence of the stock market is speculation: it is based on capital, not gravity. In the case of Shenzhen's almost virtual stock market, the role of symbolism exceeds that of the programme - it is a building that has to represent the stock market, more than physically accommodate it.'
He continued: 'It is not a trading arena with offices, but an office with virtual organs that suggest and illustrate the process of the market.'