Lighthouse, of course central banks can sell and lease gold at the same time. They were doing this in spades last decade, 500-1000 tonnes every year. Now they're net buyers. But there's still plenty of gold coming to market, from 'reservation demand' as existing holders from the 160k tonne hoard lock in profits. The impact of government influence in the gold market is over-stated, Greenspan's wasn't talking about suppressing the gold price... check these links for a different opinion:
