Warsh, appointed by US President Donald Trump and in office since May, will speak at 8:00 am local time (1400 GMT) at a remote yet storied venue for monetary policy watchers: Jackson Hole, Wyoming.Since 1982, policymakers and prominent economists have gathered in this remote valley ringed by mountains in Grand Teton National Park -- known to most people more for its bison than for spirited debates on macroeconomics. It is one of the most important central banking conferences in the world, and the Fed chair's speech to kick off proceedings is closely watched by his peers in the audience and investors worldwide.Since taking office, Warsh has delivered on his promise to drastically reduce Fed communications.He has axed forward guidance on the direction interest rates may take in the world's largest economy, and refused to share his views on the economic outlook and how surging inflation and other challenges should be tackled."What markets are looking for is really a greater sense of transparency and credibility when it comes to policymaking," said Gregory Daco, chief economist at EY-Parthenon."Because some of the communication from Fed Chair Warsh has been cryptic, and sometimes inconsistent."'Moving the goalposts'The world's largest economy has delivered robust growth despite travelling through tumultuous waters, including shocks from Trump's tariffs and his war on Iran, which has sent global energy prices skyrocketing.