CME hiked their margin requirements.  Too many people got caught when the price dipped last week and now have to cover or close out because they do not have the collateral to post.

Sounds like the usual stop hunt to me.

I don't think you can infer any implications, the market structures are vastly different.

Edit: Also, forgot to say, some "unknown" entities dumped about 400 tonnes of gold last Friday.  Had to be paper because that's like, 10% (?) of yearly production.