In 1992, Druckenmiller is said to have made $1 billion while at Soros by betting on a devaluation of the British pound, according to Bloomberg News.
Druckenmiller executed the trade by shorting the pound by buying up the German mark.
According to Bloomberg, his thought was that the Bank of England would be reluctant to raise rates and its economy was too weak to prop up its currency.
When the British government pulled out of the European Exchange Rate Mechanism, the pound plummeted. Soros Fund Management is credited for the pound being forced to leave the ERM, the report said.
Druckenmiller also bought British stocks betting they would rise because of low interest rates.
Source: Bloomberg News