S&P, NASDAQ HIT ALL TIME HIGH: Here's what you need to know

Two of the major US stock indexes cracked their all-time closing highs in trading on Friday in an otherwise relatively quiet day for the market.
As President Donald Trump so helpfully pointed out on Twitter: "RECORD HIGH FOR S & P 500!"
The Dow Jones industrial average also gained, but not enough to edge over its record.
We've got all the headlines, but first, the scoreboard:
Dow: 22,405.09, +23.89, (+0.11%)
S&P 500: 2,519.36, +9.30, (+0.37%)
Nasdaq: 6,495.96, +42.51,