Units held by products
How many units of the asset sit inside listed exchange-traded products.
Summed from each fund's published holdings. Unlike assets under management it does not move with price, so it separates flows from revaluation.
Where it misleads
Holdings are published with a lag that differs by issuer, and only US-listed products in our source are included.
Reading a high or a low value
A rise means units were added to the wrappers; price changes alone cannot move it.
Highest values in our coverage
Ordered by the figure alone. This is not a ranking of quality and carries no view.