Officials at the European Central Bank anticipate to boost interest rates further, with another hike probable as early as next month, according to sources.While policymakers' opinions will continue to be influenced by incoming economic data, stronger monetary policy may be required to keep inflation from rising above 3%, according to persons who asked not to be identified while discussing private conversations.Market expectations for three more hikes, however, may be overly optimistic, the individuals said, adding that December may be a more opportune time to raise borrowing costs, as that meeting will be accompanied by new predictions going into 2029.