Incapacity of government reserves in relation to currency transactions

Incidence 
Studies in 1992 show that the volume of currency trading has grown by over 50% over a three year period to an estimated one trillion dollars per day. This amount is equivalent to the total foreign exchange reserves held by the world's central banks. Banks are therefore handicapped by their ability to have a significant effect on the currency market and to defend their currencies.
Type 
(E) Emanations of other problems