State Street once indexed private equity from its own books

The record

State Street once marketed a "State Street Private Equity Index," built and administered by the Private Edge Group within State Street's investment analytics business. An archived copy of the product's own description page, preserved by the Wayback Machine, states the index "leverages the private equity investment data collected as part of State Street's core performance and analytics services," reporting that as of 30 June 2008 the index covered 1,400 funds with a total fund size of $1.3 trillion, with 842 funds in the sample since vintage year 2000. The live product page no longer exists on statestreet.com as retrieved on 16 September 2026, so this description is presented as an archived record rather than a current live document.

What the sources establish

The archived page draws a specific contrast with survey-based indices: "Because it does not depend on voluntary reporting of information from general partners, the State Street Private Equity Index SM is free of the reporting bias common among many other industry indices." Instead, the page says, State Street "leverages its extensive custodial relationships to collect client data," giving it "an accurate account of the amounts and timing of all cash flows within its clients' investments." A related State Street page describing its performance measurement service, also archived, adds that the firm's "proprietary performance systems are directly linked to our accounting system," with further data collated from third-party custodians and fund managers only where needed. Together, these describe an accounting-records-based benchmark, comparable in kind to Burgiss's or Cambridge Associates' approach but drawn specifically from State Street's own administered client base rather than a broader industry-wide submission process.

Scope and revision

The index's coverage was explicitly bounded by whichever institutional clients used State Street as custodian and administrator, "public and private pensions, endowments and foundations," per the archived page, not the whole private-equity and venture universe. A fund with no State Street-administered limited partner would not appear regardless of its size or performance. The product itself appears no longer to be actively marketed under this name: the current statestreet.com no longer hosts a dedicated Private Equity Index page, and this trace relies on the two archived snapshots rather than a live methodology document.

The decision in front of you

Anyone encountering a historical reference to the State Street Private Equity Index should treat it as a client-base-scoped, accounting-records benchmark from a specific period, not as evidence of a still-active, universe-wide index; confirming whether State Street currently maintains any successor product is an editorial step this trace has not completed. This is a caution about a discontinued or renamed product, not a claim that the underlying capability disappeared.

• Is a cited State Street Private Equity Index figure drawn from the same reporting period as the claim being made about it?
• Does State Street currently offer any successor to this index, and under what name?
• Is the client base behind the index representative of the fund population the reader actually cares about?

An accounting-records index is only as broad as the client relationships feeding it, and a defunct product page is itself evidence worth citing precisely.