{"funds":{"VTI":null,"VOO":null},"pairs":[],"unavailable":["VTI","VOO"],"note":"Null means no committed holdings file exists for that fund — a mutual fund share class, a non-iShares ETF, or a read that failed. It never means zero. `pairs` carries the weighted overlap of each pair of equity funds that both resolved; a pair absent from this list did not have two readable files, which is a different statement from a pair that overlaps by nothing."}