Perhaps living up to the dubious reputation of Fridays in October, stocks were drubbed last Friday. The Nasdaq- 100 (NDX) and the S&P 500 slid 3.56% and 2.71%, respectively. That was due to President Trump threatening China with 100% tariffs. And that's a familiar problem for risk assets. ETFs such as the Invesco QQQ Trust (QQQ) and the Invesco NASDAQ 100 ETF (QQQM) mega-cap tech stocks shed a staggering $770 billion in market cap in a single trading session. That doesn't mean QQQ and QQQM are down for the ...