STOCKS SOAR, DOW GAINS 240: Here's what you need to know

Markets finished higher on Monday following dovish commentary from Federal Reserve members.
All three major averages finished up by more than 1%, with the tech-heavy Nasdaq being the biggest winner. Monday marked the second straight day the S&P 500 moved by more than 1% after a 42-day stretch without such a move in either direction.
We've got the headlines for Monday, but first, the scoreboard:
Dow: 18,328.49, +243.04,(+1.35%)
S&P 500: 2,158.74, +31.29, (+1.