Could Fed chair Jerome Powell ‘trigger a big selloff’ in the ASX 200 at Jackson Hole?

The S&P/ASX 200 Index (ASX: XJO) kicked off August with a brief but fierce sell-off.

Aussie stocks came under pressure alongside European and Asian shares as the S&P 500 Index (SP: .INX) and Nasdaq Composite Index (NASDAQ: .IXIC) plunged amid concerns that the…