The American Association of Individual Investors (AAII) sentiment survey for the week ending October 11, 2024, indicates a significant shift in market sentiment. Bullish responses have risen to 49%, while bearish sentiment has decreased to 20.6%, marking the lowest level since December 2023. This shift has pushed the bull-bear spread to a 12-week high, reflecting increasing optimism among investors. Notably, professional fund managers are reportedly the most bullish ever, with positioning at record highs. Retail investors are also showing heightened enthusiasm, particularly evident in their trading of NVIDIA stock call options. The survey, which has been conducted since 1987, reveals that pessimism among individual investors is declining, with negative sentiment dropping to its lowest since the fourth quarter of 2023.