I believe COMEX changed their delivery standards 5 years ago to include LBMA 400oz bars, using a mechanism called 'ACE': https://www.cmegroup.com/trading/metal

I believe COMEX changed their delivery standards 5 years ago to include LBMA 400oz bars, using a mechanism called 'ACE': https://www.cmegroup.com/trading/metals/precious/faq-gold-enhanced-delivery-futures.html#how-does https://www.cmegroup.com/trading/metals/precious/faq-gold-en... Every wriggle of the weasel needs a good 3-letter acronym. Perhaps they knew what might happen :)