The Australian dollar is holding flat against the greenback on Thursday, as the world anticipates a series of global risk events in the United States and Europe.

At the Asian market open 07:00 (AEST), the local unit was trading at 75.50 U.S. cents, fractionally higher from 75.47 U.S. on Wednesday.

Currency markets seem to be hovering as they await the outcomes of the UK general election, the European Central Bank's monetary policy decision regarding interest rates and the Congressional testimony of former FBI chief James Comey.

At 10:00 (AEST), the Australian dollar was buying 75.41 U.S. cents.