Correlation
Use this when you want to see which stocks actually trade together. Bubbles below are clusters validated by 252-day co-movement; themes are editorial groupings to contrast against; the matrix at the bottom is the raw pairwise view. For the flat sector list instead, that's on /sectors.
New to this? Read the lesson252d corris the average pairwise Pearson correlation of the group's primary members over the last 252 trading days. Values above 0.6 indicate real thematic co-movement; values below 0.4 suggest the group is driven more by broad market beta than by idiosyncratic flow.