Hildebrand, 48, will give a public statement at the Swiss National Bank in Zurich on the affair which has already seen two separate probes and a banking industry worker sacked.
It emerged last month that his wife Kashya Hildebrand profited after buying $504,000 in August, just weeks before an intervention by the SNB to halt the rise of the franc — a move that saw the dollar rise significantly against the Swiss currency.
The purchase, which investigators said appeared to have been carried out without her husband’s knowledge, was deemed “sensitive” by auditors who nevertheless cleared the couple of any wrongdoing.
The report by PricewaterCoopers listed a number of other currency trades which on Thursday led one Swiss newspaper, the weekly Weltwoche, to dub him “speculator Hildebrand.”
The affair has raised questions over current central banking regulations and ethics.
The daily Berner Zeitung urged Hildebrand to quit, saying the SNB needed to have “absolute integrity,” while the Basler Zeitung wrote that his stepping down was “inevitable”.
His appointment as chairman in January 2010 was largely well received bythe media and commentators.