Euro Overnight Index Average (EONIA) The weighted average of overnight Euro Interbank Offer Rates for inter-bank loans. Investopedia Says: EONIA is the standard interest rate for Euro currency deposits. The European Central Bank is responsible for calculating the EONIA every day. Related Terms: Benchmark Euro Interbank Offer Rate - EURIBOR Euro LIBOR Interbank Rate London Interbank Offered Rate - LIBOR Money Market Overnight Rate Panel Bank |