The stock market usually booms in the November-to-April stretch. This indicator suggests otherwise.

The seasonal pattern often called the market's "best six months" runs from November through April, a stretch that has historically produced stronger returns than the May-to-October period. That tendency has made the November-to-April window a familiar reference point for investors tracking calendar-based patterns.

Jim Paulsen, however, argues that lagged indicators suggest this seasonal edge may not apply in the current environment. According to the source, backtesting his model to 1970 points to meagre returns rather than the outsized gains the seasonal pattern would typically imply.

The takeaway is not a signal to act, but a caution against treating seasonality as a reliable timing tool. Calendar patterns describe historical averages; they do not guarantee repeat performance, and conditions can override them. What to watch: whether the indicators Paulsen cites continue to diverge from the seasonal norm, and whether broader market drivers — earnings, rates, and economic data — matter more than the calendar in the months ahead.