Macro concerns testing resiliency of market bulls.
There has already been a steady increase in expectations of a 75 basis point rate hike when the FOMC meets in September. More importantly, expectations that the Fed will cut rates soon after the tightening cycle is complete have faded. This is leading to renewed upward pressure on bond yields (which have been experiencing their most sustained uptrend in the past 40 years). In periods of elevated inflation, stocks and bonds tend to become positively correlated. That has been on full display this year, as balanced portfolios have been mired in a more persistent downtrend than any other experienced in the past decade.