For exhausted stock market pros, the choice is buy or stay home

The stock market’s stunning rebound over the last month has largely been driven by Main Street investors buying the dip in everything in sight while professional money managers ditched US stocks, spooked by mounting fears of slowing economic growth and trade war disruptions.

But as the pile of cash on the sidelines keeps growing in the face of a resilient S&P 500 Index, which has soared 14% in a month since bottoming on April 8, Wall Street is debating whether, and when, to jump back in.