Could this be the real reason:
CME To Allow Gold As Margin Requirement Collateral
Submitted by Tyler Durden on 10/19/2009 08:41 -0500
Is JPMorgan in urgent need of gold replenishment? If one reads between the lines of today’s surprising announcement out of the CME, that the Chicago exchange will allow the use of gold as collateral for margin requirements (for up to $200 million), with the actual physical gold to be stored at JPM’s bank in London, that is one possible explanation.
Taken from Sinclair's site.
Later