Want to predict whether the market is bullish or bearish? Just look at Christmas tree sales.

This seemingly obscure indicator actually hides a big signal. Over the years, Christmas tree sales have been a barometer of overall consumer spending health—more purchases mean a hotter economy. But this year's data shows a different signal: consumers are becoming more cautious.

When mainstream consumers are slowing down their spending, it often indicates a shift in investor sentiment. Volatility in risk assets may increase, and market sentiment will be more susceptible to economic data. It is worth continuously monitoring the trend of consumer data in the coming months.