First published by Money Metals here: https://www.moneymetals.com/news/2017/05/01/london-silver-fix-in-trouble-001059

The London Bullion Market Association (LBMA) is struggling to find new operators to manage the daily silver “fix” price. Thompson-Reuters and the CME Group – which operate the COMEX exchange – are withdrawing from their role in establishing the daily benchmark price.