The following article proves it right. Central banks are selling huge abmount of their gold deposit to keep the gold price in check and keep the dollar up.
Quote: “…Elsewhere in precious metals, the European Central Bank provided confirmation that it had indeed been a heavy seller last week, with sales of gold and receivables totaling 499 million euros, or approximately 34 tons. The institution liquidated about 7.5 tons in the previous period….” (Page 2)