The QuantEngines scanner screens markets for seasonal patterns and reports verdicts that are corrected for multiple testing, including patterns that fail. A seasonal tendency is a historical observation, not a forecast, and transaction costs can erase small edges. Educational tool, not financial advice.
Sources
Quant Scanner
Screen monthly seasonal patterns across a fixed universe. Every cell reports its sample size, its effect size with a confidence interval, and a verdict corrected for the number of tests run — including the patterns that fail.
| Symbol | Month | n | Difference | 95% interval | p | q | Years against | Verdict |
|---|---|---|---|---|---|---|---|---|
| WMT | November | 36 | +3.26 pp | [1.05, 5.44] | 0.0024 | 0.204 | 10/36 | Weak |
| SPY | November | 33 | +1.63 pp | [0.17, 3.07] | 0.0342 | 0.346 | 7/33 | Weak |
| KO | November | 36 | +1.73 pp | [0.21, 3.27] | 0.0775 | 0.410 | 10/36 | Folklore |
| JNJ | November | 36 | +1.22 pp | [-0.23, 2.69] | 0.1961 | 0.594 | 12/36 | Folklore |
| XOM | November | 36 | +1.14 pp | [-0.50, 2.88] | 0.2580 | 0.673 | 14/36 | Folklore |
| PEP | November | 36 | +0.78 pp | [-0.58, 2.24] | 0.3992 | 0.791 | 12/36 | Folklore |
| AAPL | November | 36 | +1.04 pp | [-2.70, 4.87] | 0.6072 | 0.873 | 14/36 | Folklore |
| CVX | November | 36 | +0.43 pp | [-1.62, 2.74] | 0.6933 | 0.873 | 15/36 | Folklore |
| MSFT | November | 36 | +0.66 pp | [-1.97, 3.20] | 0.6625 | 0.873 | 12/36 | Folklore |
| JPM | November | 36 | +0.45 pp | [-2.95, 3.76] | 0.7709 | 0.890 | 16/36 | Folklore |
How to read this
Read the q column, not the p column. A p-value below 0.05 looks convincing on its own, but 120 tests were run together here. The q-value corrects for that. At a false-discovery threshold of 10%, roughly one in ten entries that cleared it would still be expected to be a false positive — which is why we state the threshold rather than just the winners. See our guide to multiple-testing correction and the deflated Sharpe ratio for the statistics behind why this matters.
Years against counts the years in which that month moved opposite to the overall effect. A pattern with a decent average and a third of its years against it is a weaker claim than the average alone suggests, so both are shown.
A cell needs 20 observations to be graded at all and 25 to be eligible for Robust. Cells below the first threshold are reported, never quietly dropped.
Universe: 10 symbols (AAPL, CVX, JNJ, JPM, KO, MSFT, PEP, SPY, WMT, XOM). Data: fmp adjusted end-of-day, 1990-01-02 to 2026-09-28. Methodology version 0.4, generated 2026-09-28T23:32:19+00:00. Survivorship is not corrected for in this universe; that limitation applies to every figure above.
We compute and display. We never recommend. Nothing here is a forecast, and no verdict is advice to buy or sell anything — see the disclaimer.