StockDriftsStockDriftsMethodology, data analysis, and the thinking behind StockDrifts signals.
113,117 insider purchases from 2016 to 2025, scored on 12-month returns against a size-matched index: what copying insiders earned, and when it paid.
19,978 CEO purchases, 2016 to 2025: how the size of the bet and the stock's liquidity changed the 12-month return, plus this quarter's big CEO bets.
12-month returns by how many insiders bought the same stock within 30 days, 2016 to 2025, in liquid and thinly traded stocks, plus this month's clusters.
The weekly ratio of US insiders buying to selling since 2016, and what the S&P 500 did in the year after insiders bought most. With this week's reading.
Why insider buys in thinly traded stocks lagged, when buying the dip was a falling knife, what microcap insider selling meant, and five rules tested.
3,769 active 13F filers scored against the S&P 500 over five years, through the 2022 bear market. Size, concentration, holdings count and position sizing, with nine charts and every fund downloadable.
5,004 funds split into two 18-month halves: how often top-quintile records repeated, who fell to the bottom, five-year streaks versus chance, and what a three-year record predicted next.
Q2 2026 13F filings: 763 four- and five-star funds against 3,363 bottom-rated funds by industry, sector, market cap and single stock: semiconductors, tobacco, disk drives and power producers on one side, REITs and insurers on the other.
24,746 positions at 763 top-rated funds measured against their estimated purchase price: the most widely held losers, the biggest unrealized gains, big bets below cost, and where the crowd paid more.
763 top-rated funds' June 30, 2026 books frozen through the July 29 semiconductor low: what they held, what they sold in Q2, and whether it helped.
The definitions behind every StockDrifts 13F study: how the one-to-five star rating is computed, why 12 quarters are required, who is excluded, and what Form 13F cannot show.
170,720 share-count changes across 56,930 Korean DART filings, ranked by cross-sectional alpha into signal tiers. See which insider buys actually pay.
101,000+ Japanese large-shareholding filings scored on fixed 12-month forward returns. See which EDINET insider signals predict returns, and which don't.
How StockDrifts rates every EDINET filer 1–5 stars, using a composite of 5-year and 3-month returns across 50,000+ filings. The full methodology, in detail.