When Nvidia, the chip producer, reports earnings next week, investors expect the S&P 500 to have a bigger reaction than when the Fed chair delivers a big speech on Friday.

Stock futures are down on Aug. 20 as investors await Fed meeting minutes and key earnings from Target and Lowe's. See the latest market moves

A flight to quality trade happens when investors begin to get more defensive and risk-averse, buying stocks that they perceive as higher-quality and avoiding low-quality ones. It’s typical of a market that is seeking safety as some investors bail out, and may presage a market drop.

Follow all the latest U.S. market action for Tuesday here to see if stocks can shake of some summer torpor and reach fresh highs.

The Nasdaq and S&P 500 dipped today, driven by tech stocks, 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.