The S&P 500 closed Wednesday at 6,946.13 — a clean 0.81% gain and the second green day in a row. Then Nvidia Corp (NASDAQ:NVDA) reported its fourth-quarter results. The stock popped 3.5% after hours. Then it faded. By the time most traders called it a day, Nvidia was below $200 again.
That sell-the-news wobble is likely the reason a bet on Polymarket opened at 60% “Down,” 40% “Up,” with $42,660 in volume already placed against a simple question: “S&P 500 (SPX) Opens Up or Down on February 26?”
Polymarket, based on Polygon (CRYPTO: POL), allows users to buy “Yes” and “No” shares in USDC