sentences:  The broker (agent clearing member) provides the necessary collaterals and acquires/sells the required electricity volumes for its clients, in return for a small brokerage fee.In either case, EXAA functions as a central counter-party to every trading transaction, which means that EXAA guarantees the physical fulfillment of every trade.Besides its function as a marketplace for spot electricity, EXAA also supports regional initiatives related to electricity markets and provides a training program - teem, for electric utilities and different stakeholders from the energy industry.