InsidersTradesSigma
Quantitative Signals & Scoring
The trailing return of a stock's sector index, used as a contextual factor: an insider buy is more potent when the sector itself is in an uptrend.
Sigma reads the 180-day point-in-time return of the relevant sector at the filing date (no look-ahead). A high-conviction buy that coincides with positive sector momentum is treated as corroborated; the same buy against a falling sector is discounted. The point-in-time discipline matters: the sector return is measured as it was known on the trade date, never with hindsight.