On December 16, 2024, the S&P 500 experienced fluctuating breadth metrics throughout the trading day. Initially, positive breadth was noted, marking the first instance of such a trend in December. However, as the day progressed, reports indicated a return to negative breadth conditions. The VIX, a measure of market volatility, saw a slight increase of 4%, reflecting the market's uncertainty. Trading volume was notable, with the SPY exchange-traded fund reaching 10 million shares traded by noon Eastern Standard Time, a significant figure for December trading sessions. Despite the early positive signals, the overall market breadth remained challenged as the day concluded.