This chart tells a simple but powerful story. Since 1950, the S&P 500 has most often made its annual high in December, not in the middle of the year, not during the summer, and definitely not around the weaker seasonal windows investors love to panic about.
December dominates with 32 annual highs. January comes second with 12. After that, the numbers drop sharply. February, April, and May only saw 2 each. March had just 1. June had zero. Then the market slowly rebuilds momentum into the final quarter, with September at 5, October at 6, November at 8, and then December suddenly jumps like it found a double espresso and a trading terminal.
The message is clear. Markets rarely peak early when momentum, liquidity, and risk appetite are still building. A strong December reading suggests that when the market is healthy, investors tend to keep chasing performance into year-end. Fund managers want to finish strong, institutions rebalance, and optimism often compounds as the calendar closes.
For commodities, the cause and effect is important. If equities keep grinding higher into year-end, it usually signals risk appetite is still alive. That can support cyclical commodities like copper, oil, uranium, and industrial metals because investors are still pricing growth, not recession. Gold is more complicated. If the rally is driven by liquidity and falling real yields, gold can rise too. But if the rally is pure risk-on, gold may lag while base metals and energy lead.
So this chart is not just about stocks. It is a temperature check for market psychology. And right now, history says the final act often matters most.
