> For the complete documentation index, see [llms.txt](https://docs.stakeup.finance/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.stakeup.finance/protocol/ecosystem-mechanics/stusdc.md).

# stUSDC

## stUSDC vs wstUSDC

There are two versions of StakeUp stTokens, namely stUSDC and wstUSDC. Both are fungible tokens but they reflect the accrued yield differently.

## stUSDC

The token's yield is updated every `24 hours` through the `poke` function and rebases constantly as the previous day's yield is dripped to users. A user is able to redeem their `stUSDC` at a rate 1:1 to `USDC` 

{% hint style="warning" %}
For users not familiar with rebasing tokens:

* Token balances will change according to the amount of yield accumulated within the system.
  {% endhint %}

## wstUSDC

Provides an alternative to the rebasing version of `stUSDC`. It has a static balance by representing the share that a user has in the system. At any given time, anyone holding wstUSDC can convert any amount of it to stUSDC at a fixed rate, and vice versa. The rate is the same for everyone at any given moment. This method allows for enhanced composability across DeFi. 

{% hint style="warning" %}
For users not familiar with rebasing tokens:

* Due to the fact that `wstUSDC` is non-rebasing, the user's balance while holding the token will remain static and value accrual be reflected in the exchange rate of the token.
  {% endhint %}

## Wrapping

Users can wrap their `stUSDC` token by calling `wstUSDC::wrap` . The conversion is based on the current exchange rate, which reflects the total value of `stUSDC` in circulation.

## Unwrapping

Users can unwrap their `wstUSDC` token by calling `wstUSDC::unwrap` . The conversion is based on the current exchange rate, which reflects the total value of `stUSDC` in circulation.

## Fees

There is a 10% performance fee on yield generated within `stUSDC`. This fee is paid fully to the stakers of the SUP token within the StakeUp Protocol.

<figure><img src="/files/zvlaSz2dU0lktWqL2Gg5" alt="" width="375"><figcaption><p>10% Performance Fee</p></figcaption></figure>