What if the markets were following a tempo that escapes economic logic? While the U.S. GDP is declining, the S&P 500 is rebounding after a sharp drop of nearly 20%. This unexpected turnaround, fueled by contradictory signals, intrigues even in trading rooms. Indeed, at BNP Paribas, strategists are wondering: does this sudden correction fit into a global tradition? To understand it, they delve back into a century of stock market crash history.