U.S. stocks dipped on Tuesday as investors gear up for what Federal Reserve chair Jerome Powell will say about the path of interest rates at a key conference later in the week. The Nasdaq slid more than 1% to its lowest in over two weeks as megacaps Nvidia and Microsoft lost 3.

The annual Jackson Hole Economic Symposium takes place later this week. It will attract policymakers from around the world and feature highly anticipated remarks from Federal Reserve Chair Jerome Powell.

U.S. stock-market futures rose slightly Sunday, after Friday’s summit between U.S. and Russian leaders ended without a major breakthrough and as investors await this week’s Fed gathering in Jackson Hole,