The rate cut itself may have been telegraphed, but Jerome Powell’s press conference Wednesday clearly came as a shock to stock traders.
Volume exploded as he spoke. About 549,000 of the most popular S&P 500 futures contracts changed hands between 2 p.m. and 3 p.m. New York time, the most for any hour this year. At its worst level, the cash index was down 1.8%, an intraday drop that dwarfs any on the day of a meeting since Dec. 19, when the Federal Reserve was raising rates.