Dec 15 (Reuters) - The Monetary Authority of Macao said on Thursday it raised the base rate for the discount window by 50 basis points to 4.75%, hours after Hong Kong lifted a similar rate by the same margin in the wake of higher U.S. interest rates.

As Macau's pataca currency is linked to the Hong Kong dollar, the movements of policy rates in Hong Kong and Macau should be basically consistent in order to maintain the effective operation of the linked exchange rate system, the authority said. (Reporting by Twinnie Siu and Donny Kwok; Editing by Jacqueline Wong)