# Spark plans staged deprecation of Avalanche spUSDC

> The vault is scheduled to be marked deprecated by September 11, its yield reduced to 0% on November 1, and its deposit cap and maximum-rate parameters set to zero on November 9.

- URL: https://riadefi.com/on-chain/2026-08-31-spark-savings-avalanche-spusdc-deprecation/
- Type: Closure or deprecation
- Stage: Proposed
- Evidence: confirmed
- Materiality: material
- Event date: 2026-08-31
- Version: 1, published 2026-09-15 (first published 2026-09-15)
- Follow-up: 2026-09-11
- Advisor-relevant: yes
- Affects: Spark Savings (product)

## What happened

Phoenix Labs announced a staged deprecation of the Avalanche Spark Savings USDC vault, with interface, yield, and deposit changes scheduled from September through November 2026.

## What changed

The vault is scheduled to be marked deprecated by September 11, its yield reduced to 0% on November 1, and its deposit cap and maximum-rate parameters set to zero on November 9.

## What did not change

The notice says withdrawals will remain enabled after final deprecation and that sufficient USDC will fund outstanding spUSDC liabilities. It expressly excludes every other Spark Savings vault.

## Confirmed

- The notice applies only to Avalanche Spark Savings USDC, identified as spUSDC.
- The first scheduled deprecation milestone is September 11, 2026.
- Yield is scheduled to fall to 0% on November 1, 2026.
- New deposits and interest accrual are scheduled to be disabled on November 9, 2026.
- Withdrawals are expected to remain available after final deprecation.

## Still open

- Whether each scheduled governance or configuration action executes on time.
- The outstanding spUSDC supply and proposed-size withdrawal liquidity at each milestone.
- Whether the web application applies any additional access restrictions before final deprecation.

## What it means for an advisor

- Update the Spark Savings diligence file to identify Avalanche spUSDC as a distinct product on a dated retirement path.
- Do not apply the Avalanche deprecation to the canonical Ethereum USDS and sUSDS memo; the official notice says other Spark Savings vaults are unaffected.
- Any identified spUSDC holder requires an exit-capacity review before the zero-yield and deposit-disable dates.

## Sources

1. [Notice of Planned Deprecation: Avalanche Spark Savings USDC (spUSDC)](https://forum.skyeco.com/t/notice-of-planned-deprecation-avalanche-spark-savings-usdc-spusdc/28209) · Sky Forum / Phoenix Labs · 2026-08-31


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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.