The January Effect
StatsEdgeTrading
Last Friday we talked Santa Claus Rally. This time, we are staying in the same holiday neighbourhood and digging into the January effect.
Quick definition that actually matters: the January effect is not “stocks go up in January.” It is that small caps tend to outperform large caps by roughly three to seven percent from mid December into the first quarter. That is real spread for simply changing where you hunt.
Why does this exist? Taxes and human behavior.
Into November and early December, investors dump losers to harvest tax losses. By definition, a lot of those losers are small caps. The tiny companies that have not yet “graduated” into mid or large cap status are the ones still sitting in the doghouse at year end. That forced selling pushes prices down for reasons that have nothing to do with long term business quality.
Then two things happen:
The tax loss selling window closes, so that extra selling pressure fades.
Once the wash sale window is over, investors who still like those names are free to buy them back.
Less selling plus some fresh buying equals small caps perking up. On a ratio chart of IWM divided by SPY, which shows up as the line turning higher: small caps outperforming large caps. Lately we have seen that ratio flip up right on schedule.
So what do you actually do with this as a trader?
You do not abandon your edge and YOLO into random penny stocks. You simply tilt your focus. If you usually live in mega cap tech, this is a good window to scan harder in the small cap universe. There are roughly two thousand names in IWM across banks, healthcare, biotech, industrials, and more. That variety is a gift to any system that looks for relative strength.
At StatsEdgeTrading we let the systems decide: large caps when they are leading, small caps when they wake up. A strong January effect just means more opportunity for the scans to latch onto strong small caps while the seasonality wind is at their backs.
If you want to start the new year trading with a statistical edge instead of just drawing lines that “feel right,” head over to www.statsedgetrading.com for free courses, the newsletter, and full access to StatsEdge Pro. Quant beats vibes.