# Spark proposes reducing Sentora RLUSD vault’s WBTC concentration cap

> The proposed cap would restrict additional allocation to that market; execution is planned after an approving October 8 poll result.

- URL: https://riadefi.com/on-chain/2026-10-04-spark-sentora-rlusd-wbtc-relative-cap/
- Type: Economic change
- Stage: Proposed
- Evidence: confirmed
- Materiality: watch
- Event date: 2026-10-04
- Version: 1, published 2026-10-05 (first published 2026-10-05)
- Follow-up: 2026-10-09
- Advisor-relevant: no
- Affects: Spark Liquidity Layer (protocol); Morpho Blue (curated vaults) (protocol)

## What happened

Spark published a proposal to reduce the WBTC-collateralized RLUSD market’s relative supply cap in the Sentora vault from 100% to 10%.

## What changed

The proposed cap would restrict additional allocation to that market; execution is planned after an approving October 8 poll result.

## What did not change

The absolute cap, oracle, 86% LLTV, roles and fees remain unchanged. The cap reduction does not rebalance existing supply or guarantee continuous exposure below 10%.

## Confirmed

- The affected vault is 0xFC8C624B6080a0A780583799f2A862DE936F6E22.
- The proposed execution uses the existing joint 2-of-2 curator Safe.
- The official October 5 snapshot places accrued market exposure at approximately 9.732% of vault assets.
- The proposed function is immediately callable by the curator, without an on-chain scheduling or cancellation window.
- The record states that idle-liquidity withdrawal routing remains unchanged.

## Still open

- Poll approval, curator execution and post-execution cap value.
- Execution-time exposure and remaining allocation headroom.
- Any intervening liquidity-adapter or pending-cap changes.

## What it means for an advisor

- Monitor approval and execution in Spark and Morpho diligence files.
- Update concentration-limit assumptions after execution evidence arrives.
- Keep withdrawal-liquidity analysis separate from the tighter allocation cap.

## Sources

1. [Technical Scope: Sentora x Spark RLUSD WBTC Relative Supply Cap Reduction](https://forum.skyeco.com/t/technical-scope-sentora-x-spark-rlusd-wbtc-relative-supply-cap-reduction/28280) · Spark / Phoenix Labs · 2026-10-04


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Published by Ketju Research on RIADeFi (https://riadefi.com). Educational research for financial professionals; not investment, legal, tax, or compliance advice.