To consider whether that was feasible, the authors analysed the global absorptioncapacity of three export industries steel, shipbuilding and machinery.
The downgrades were "driven by the increased risk of further shocks emanating from the euro-area debt crisis, in combination with the banks' limited loss-absorption capacity, " Moody's said.
German banks are at risk of continued asset deterioration as the crisis grows and the global economy slows, and they have limited-loss absorptioncapacity to face a stress scenario.
There is still reason for alarm due to the nation's demographics and low tax revenue which will constrain capacity for debt absorption, create increasing cash outflows and create future concerns about market instability.