According to Charlie Bilello, he highlighted the worst-performing S&P 500 stocks year-to-date on Dec 1, 2025, drawing attention to large-cap laggards that often see concentrated flows into year-end. source: Charlie Bilello on X, Dec 1, 2025. Traders use such laggard lists to target December tax-loss selling pressure and plan January effect mean-reversion setups in those tickers. source: CFA Institute Research Foundation, Tax-Loss Harvesting; Haug and Hirschey, 2006, The January Effect. For execution, monitor closing auction volume spikes, short-interest updates, and options implied-volatility skew on the named symbols to time entries and manage gap risk. source: Cboe Options Education on skew and hedging; FINRA short interest data. Sector-led drawdowns can spill over into digital-asset risk sentiment, with BTC and ETH correlations to U.S. equities tending to rise during broad risk-off episodes. source: Kaiko Research, 2022–2024 BTC–equities correlation studies. Review Bilello’s underlying list before acting, as ticker-specific catalysts and liquidity conditions drive risk-adjusted expectancy. source: Charlie Bilello on X, Dec 1, 2025.