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# Mentat Launches Robotics Index With Three Bittensor Subnet Holdings
- URL: https://www.tao.media/mentat-launches-robotics-index-with-three-bittensor-subnet-holdings/
- Published: 2026-10-19T17:22:28.000Z
- Updated: 2026-10-19T17:22:30.000Z
- Description: The automated basket gives TAO holders sector exposure without managing individual subnet allocations.
- Author: Bart Hillerich
- Tags: Mentat, Subnets, Robotics, News

[Mentat](https://mentatminds.com/?ref=tao.media) has launched a [robotics sector index](https://x.com/mentatminds/status/2112212785476325538?ref=tao.media) for Bittensor, giving TAO holders an automated way to allocate capital across three robotics-focused subnets, [OpenRoboto](https://www.tao.media/tag/openroboto/), [Swarm](https://www.tao.media/tag/swarm/), and [Nepher Robotics](https://www.tao.media/tag/nepher-robotics/).

The basket follows Mentat’s sector-index model, holding the top three eligible subnets by market cap and rebalancing automatically as the rankings change.

Users can access the [robotics index](https://mentatminds.com/?details=robotics&ref=tao.media) through the platform, with an estimated APY at time of writing of \~50.3%.

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Announcement video

## How Selection and Weighting Work

Mentat uses two separate calculations to determine which subnets enter a sector index and how capital is distributed among them.

Under its [sector methodology](https://mentat-minds-doc.gitbook.io/mentat/invest/sectors?ref=tao.media), Mentat determines membership using an exponential moving average (EMA) of market capitalization. An EMA smooths observations over time while giving more weight to recent values, so selection follows a smoothed ranking rather than a single market snapshot.

When a new subnet enters the EMA-based top three, Mentat adds it to the index and reallocates the portfolio, investing all capital allocated to the sector across those three holdings.

![Mentat Robotics index UI](https://storage.ghost.io/c/78/0b/780ba906-b1a7-4bf0-873c-bdd5c32e5331/content/images/2026/10/HVATjXOXMAA5zK2.jpg)

Mentat Robotics index UI | Mentat

Position sizes use a different input, an EMA of subnet prices.

Higher-priced subnets receive a larger allocation, making this a price-weighted basket within a market-cap-selected group (rather than an equal-weight portfolio). Mentat also selects validators on each subnet to manage the staking side of the allocation.

## Eligibility Comes Before Ranking

The eligible universe extends beyond the three launch holdings. Mentat said [Robotensor is also eligible](https://x.com/mentatminds/status/2112212788496015463?ref=tao.media), allowing it to enter the basket if it reaches the required ranking.

Mentat maintains official subnet links, cross-checks them against Bittensor’s official Discord, and reviews sector classifications weekly. The team reviews proposed additions, removals, and classification changes before applying them.

Responding to a question about THOR, Mentat said the project was [not yet eligible](https://x.com/mentatminds/status/2112218144219828600?ref=tao.media) because its GitHub was not public and it had not claimed its channel on the official Bittensor Discord. The team said THOR would become eligible once both requirements were met.