Stocks have historically reacted well to Fed rate cuts. Since 1971, the first Fed cut has led to positive returns for investors 100% of the time in the next six months, with an average gain of 13%, according to Fundstrat's Tom Lee.

The uncertainty accompanies a debate over whether a jumbo rate cut would panic or reassure investors jittery about whether a slowing economy could suddenly slide into recession, w

NEW YORK, Sept 19 (Reuters) - An initial muted market reaction following the Federal Reserve’s first rate cut in four years gave way to a surge in U.S. stocks as uncertainty ebbed and investors digested the implications of easing monetary policy.