investors tended to infer future changes in fiscal and monetary policy from political events, which were regularly reported in private correspondence, in newspapers and by telegraph agencies. Among the most influential bases for their inferences were three assumptions: that any war would disrupt trade and hence lower tax revenues for all governments; that direct involvement in war would increase a state's expenditure as well as reducing its tax revenues, leading to substantial new borrowings; and that the impact of war on the private sector would make it hard for monetary authorities in combatant countries to maintain the convertibility of paper banknotes into gold, thereby increasing the risk of inflation.