Microsoft CEO Satya Nadella has sold 838,584 shares, yielding more than $285 million ahead of capital gains tax changes.
Treasuries rallied big time on haven buying and cushioned the selloff in global risk markets.
Investors who have sold borrowed shares in company, anticipating they can buy back after they fall, have seen $253 million in mark-to-market gains.
The Fed is "very much behind the curve' on inflation, Jeremy Siegel, prominent finance professor at the Wharton School, says.