According to Eric Balchunas, citing @psarofagis, the S&P 500 has averaged nearly a 1% gain specifically on Wednesdays in 2025, while all other weekdays have shown negative returns. This breaks historical trading patterns and could indicate a unique short-term trading opportunity for day traders and swing traders looking to capitalize on weekday volatility. As per the analysis, this anomaly in daily returns is statistically significant and may influence short-term trading strategies for S&P 500 futures and ETFs (Source: Twitter/@EricBalchunas, 2025-05-02).