This week's coordinated interest rate cuts by several nations' central Banks appear to have had little or no effect on investors' confidence.

He "could this time explicitly mention the 'rate cut option' when repeating his' no bias' message, to suggest that the likely next ECB move is down," Moec said.

Central banks in some richeconomies, in particular Britain and the euro zone, still have room to cut rates—though it is notable however fairly dramatic cuts are not working as they once did.