Market-wide 13F holder flows for a closed quarter: what each kind of filer bought and sold of 13F common shares, its net flow, net flow as a percentage of its prior 13F book, and net buyers against net sellers. Trades are each filer's share changes priced at the security's average close over the quarter, else its quarter-end value per share (an exit at the quarter before's); options and principal amounts are left out, and a share change from a corporate action reads as a trade. Only filers with a 13F the quarter before are compared. Holder type is each filer's current regulatory profile, never its name; client base and private funds come from the Form ADV roster current at the quarter end (rosters from December 2019); style, turnover, horizon and book size are measured from its own 13F book that quarter. With groupBy=sector each bucket's flow is split by its issuers' sectors, with exchange-traded products apart. Quarters still in their 13F filing window are not computed.