Mezzi Fund Proxies and Missing Account Data: May 2026

Updated September 26, 2026.

Archived article dated May 30, 2026. This dated product update has been edited for clarity. Launch details and roadmap statements below refer to the original publication date; screenshots are historical illustrations. See current membership options and the Mezzi help center for today’s product details.

Mezzi has always given you a clear view of your portfolio. Now we're going deeper with two new capabilities that are live in beta, and we want you to be among the first to benefit from them.

See inside your retirement funds

Some 401(k) and 529 accounts hold proprietary funds or investment vehicles without the public holdings data needed for look-through analysis. Target-date strategies can also use these structures, though many target-date mutual funds publish holdings. This beta let the team assign a proxy so X-Ray could estimate asset-class, sector and geographic exposure for otherwise opaque holdings.

Fill gaps in tax and performance data

Brokerages don't always send complete data. Cost basis, for instance, sometimes gets lost in the transfer. We can now go in and fill those details in directly, helping analysis use more complete account records.

Ready to make updates?

While these features are in beta, our team is personally making these updates on your behalf — just contact us with what you'd like adjusted and we'll take care of it. At publication, self-service changes through AI Chat were planned.

A proxy makes an estimate possible, not exact

For a hypothetical $10,000 plan holding, a proxy with an 80% stock and 20% bond allocation represents approximately $8,000 of stock exposure and $2,000 of bond exposure. The actual fund may differ in holdings, fees, glide path, distributions and timing.

Ask which proxy was assigned, why it fits the original fund, and what date its underlying data represents. Keep a distinction between the actual account balance and the exposure inferred from the proxy. Do not substitute the proxy's purchase price for the real holding's tax basis.

What should I send when correcting missing data?

Identify the account and holding, the field that is missing, and the dated brokerage or plan record supporting the correction. Avoid replacing a missing value with zero simply to make a chart complete. After a change, reconcile the result with that record.

The team-assisted beta and future self-service workflow described above refer to this launch. For the current process, use the help center rather than assuming the roadmap item has shipped.

By Manish Jain, CFA, co-founder of Mezzi. Original publication date retained; editorial clarification September 26, 2026.

This historical product update is for informational purposes. Examples are illustrative, not investment recommendations or promised results. Account coverage and data quality affect analysis. Review assumptions before acting; AI can make mistakes.