Bloomberg has postponed changing the UBS Bloomberg Constant Maturity Commodity Index (CMCI) business day convention until further notice.

Below is the link to the original announcement made on November 20, 2017:
https://www.bloombergindices.com/2017/11/20/update-ubs-bloomberg-constant-maturity-commodity-index-family-business-day-convention/

Please contact commodities@bloombergindices.com for more information.