Due to the ultimate ineffectiveness of the Bretton Woods Accord and
the European Joint Float the forex markets were forced to close sometime
during 1972 and March 1973.The very largest of all purchases of dollars in the history of 1976 was
when the West German government achieved an almost 3 billion dollar
acquisition "Exchange markets had to be closed. When they re-opened ...
March 1 " that is a large purchase occurred after the close