Shares in Bannerman Resources closed down 28 per cent after the release of prefeasibility study results pegged the capital cost of the Etango uranium project in Namibia at $US555 million ($A609 million).

Shares in Bannerman Resources closed down 28 per cent after the release of prefeasibility study results pegged the capital cost of the Etango uranium project in Namibia at $US555 million ($A609 million).