Nasdaq seasonality and recurring calendar trends
Technology-heavy indices can behave differently from broad-market benchmarks. Testing Nasdaq seasonality helps separate genuine recurring tendencies from patterns that are specific to the S&P 500 or other markets.
Why Nasdaq seasonality can differ
Sector concentration
Technology and growth stocks often react differently to rates, earnings cycles and investor risk appetite.
Volatility
Higher volatility can make seasonal averages look stronger while also increasing the range of yearly outcomes.
Regime sensitivity
Long-term averages may mix very different periods, making recent-vs-long-term comparisons especially useful.
How to test a Nasdaq pattern
Start broad
Compare full months or well-known windows such as November–April, September, or year-end.
Then stress-test
Shift the dates slightly and compare 10-, 20- and 25-year results. Robust seasonality should not depend on one exact date or a handful of outliers.
Open Nasdaq in the free dashboard
Use ^IXIC as a starting point and inspect the historical years behind the average seasonal path.