Federal Reserve chair is under bombardment from Donald Trump and battling an insurgency within the central bank

The stock market is heading into a catalyst-filled week as Fed Chair Jerome Powell gets ready to speak at Jackson Hole and big retailers report earnings.

By Elizabeth Howcroft PARIS (Reuters) -European stock markets fell slightly in early trading on Thursday, hovering just below recent highs, as traders avoided making big moves and waited for the Federal Reserve's three-day annual Jackson Hole symposium.

The Nasdaq fell as megacaps lost, after having rallied for much of the year. Nvidia fell 3.5%, the biggest drop in nearly four months.