Knowledge center · Factor library
3-Month Momentum
Price return over the trailing ~3 months (63 trading days).
Formula
t-statistic of the price return over the trailing 63 trading days
Interpretation
A shorter-horizon read on the same momentum effect as the 12-1 factor, more responsive to recent shifts.
What good looks like
Positive and statistically significant — recent medium-term strength.
What bad looks like
Negative — recent medium-term weakness.
Typical range
Z-scored, capped at roughly ±3.
Limitations
Shorter windows are noisier and more prone to whipsaw than the 12-1 factor.
How OmniSignal uses it
Captures medium-term trend that the longer 12-1 window can lag.
Where it enters the score
Momentum family
References
Jegadeesh & Titman (1993)
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