Mercer completes Aspen direct indexing rollout across more than 43,000 accounts

Mercer Global Advisors has completed the rollout of Aspen Investing, its own direct indexing platform, across more than 43,000 accounts.

Those are accounts, not clients. The coverage gives no client total, no asset figure and no breakdown of how the 43,000 accounts are spread across the three custodians the platform is designed to run at.

The disclosed details are operational. Aspen runs on technology built with Orion, harvests tax losses daily, is designed to run at Schwab, Fidelity and Raymond James, and can work around low-basis legacy holdings, according to Mercer.

Breadth is the test here. Every account carries its own cost basis and its own constraints, so pushing a tax-managed index overlay into 43,000 of them is an exercise in data and trading rather than a product announcement. The coverage offers no tracking figures, no error rates and no adoption numbers, which leaves the scale claim standing on the account count alone.

Mercer owns the platform; the technology underneath was built with Orion. That is a narrower decision than insourcing everything: the engine comes from outside, and what stays at Mercer is the client-facing product and the tax work applied to a particular book.

Mercer disclosed no fee levels and no projected savings, which leaves the strategic case for owning the platform untested. The usual argument for building rather than licensing is that the manufacturing stays with the firm instead of being paid away to an outside manager for the same index exposure and tax overlay. That argument may hold here. The disclosure does not let a reader check it.

Daily harvesting is the other claim about machinery rather than results. It says how often the system looks for losses; it does not say what it finds, and the coverage reports no realized-loss figures against which to judge it.

The load-bearing claim in the rollout is the legacy-holdings workaround, which the coverage states but does not explain. Selling an appreciated position to make room for an index hands the client a tax bill, so the simplest version of direct indexing runs on new money. A program that can wrap an index around positions a client will not sell addresses the harder case: the book that already exists.