Larry McDonald, a Wall Street veteran formerly with Lehman Brothers, warned that the S&P 500 could tumble 20-35% over the next year. Key risks cited include surging oil prices driving inflation, the Federal Reserve keeping rates higher for longer, AI disruption across industries, and potential unemployment rising from 4% to near 6%. Forbes notes that typical market top signals - including IPO surge, excessive leverage, and euphoria - are currently absent. Historical data shows only 6 of 27 corrections since 1974 turned into bear markets. Currently, 16 of 25 S&P 500 industry groups are in correction territory, with software, real estate, autos, and commercial services already in bear market territory (down 20%+).