Profit-taking finally slammed the market’s recent leaders, as cash shifted back to big techs.   Dow ends -300, -1.1% to 27,272. SandP -0.8%.   But Nasdaq added 0.3% to a record as tech giants incl $AMZN, $AAPL, $FB and $AMD surged.  Energy, banks, airlines and industrials all slid.