Short-seller Carson Block says the day-trading revolution that hit GameStop and other stocks is changing the playing field for investors like him. Here's how his firm is reinventing itself — and what he's betting against today.

5:12am PST - February 9th, 2021    stock market today - Business Insider

Summary List PlacementShort-sellers faced a new reality the last few weeks as retail squeezes became a threat they could no longer ignore. A saying sometimes attributed to the famous economist John Maynard Keynes warns investors, "Markets can remain irrationa…