AdWords Managed Accounts (Or MCC) Can Now Share Negative Keyword Lists Across Accounts

Google has silently rolled out another update for Managed Accounts and this time it’s the ability to create and share negative keyword lists across multiple accounts. Moving onwards, for accounts in a managed account, you can create a single list of negative keywords in the top-level Shared Library that can then be applied to campaigns at the individual account.

Manager account-level lists show up in the Shared Library of each account with the label “Shared from a manager account.” Just like any other list in the Shared Library, click the checkbox next to it to apply it to campaigns within that account.

See the full details here https://support.google.com/adwords/answer/7177954.