Forty mostly unrelated stocks have started behaving like a single, unusually synchronized unit. This is not just market noise: the cohort is moving together after the broad market effect has been removed.
Jodie’s numbers show: The group’s recent average pairwise residual correlation is 0.78, versus a long-run baseline of 0.05, a gap that sits 3.7 standard deviations above normal. Novelty on this particular mix is 0.91, and 685 pairwise links passed significance tests. Active participation on July 31 was 36 of 40 names.
Composition matters here because the roster is not a neat sector cluster. Industrials are the largest slice at 22.5% of the group, but nine sectors are present. Notable members showing up in the recent activity include ABM and Illinois Tool Works on the industrial side, Tetra Tech and Veralto among industrial names, and a set of REITs and property plays such as Extra Space (EXR), Public Storage (PSA) and Simon Property Group (SPG).
Those examples are for color, not causality. Over the past six sessions ABM was up about 0.5%, ITW about 1.5%, Tetra Tech about 4.5%, Verisk was down roughly 3.2% and Waste Management down roughly 5.1%. The point is that most names in the universe moved above Jodie’s activity threshold on the same day, not that one of those ticks pulled the others.
Why this reads as unusual: the correlation measure is residualized, meaning broad market moves (S&P up or down days) were removed first. What’s left is the group’s shared motion beyond the market’s direction. Statistically, going from a normal 0.05 to 0.78 across 40 names is a big leap; 3.7σ is not subtle noise.
The cross‑sector mix is notable. A heavy industrial presence plus a cluster of real‑estate names and companies from consumer cyclical, financial services, healthcare and tech means there is no single obvious business model tying the group together. That makes the co‑movement notable even before you start hunting for macro threads or shared exposures.
This is strictly a contemporaneous description. Jodie’s analytics flag the pattern and quantify how unusual it is; they do not imply causation, lead‑lag relationships, or that the pattern will keep holding.
This is a descriptive co‑movement observation generated from Jodie’s analytics, not investment advice.