On second thought, my guess is that this was a major hedge fund who decided to dump their gold position as their "safe haven" hedge to get back on the US equity bandwagon as all is now well in the world thanks to the FED. The cartel usually doesn't care if gold goes up a bit as long as the equities are in rally mode. What they can't stand is for gold to be viewed as a preferred alternative to the paper assets.
stateside