Using monthly data for Germany from 1968 through 1998, the relationship betweenfluctuations of prices in financial markets and inflation is analyzed. The results of Granger-causality tests reveal that stock market has no predictive power volatility for inflation uncertainty, et vice versa. Regarding the subsequent volatility of short-term and of long-term interest rate. In contrast, inflation uncertainty provides some information. The hypothesis of a causality running from the volatility of the real exchange rate to inflation uncertainty cannot be rejected.