# TricryptoUSDC Parameter Update

**URL:** <http://gov.curve.finance/t/tricryptousdc-parameter-update/11172>\
**Category:** Proposals\
**Created:** [September 9, 2026, 11:39am UTC](http://gov.curve.finance/t/tricryptousdc-parameter-update/11172 "2026-09-09T11:39:51Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![phil\_00Llama](http://gov.curve.finance/user_avatar/gov.curve.finance/phil_00llama/32/2339_2.png) [@phil\_00Llama](http://gov.curve.finance/u/phil_00Llama)\
**Post date:** [September 9, 2026, 11:39am UTC](http://gov.curve.finance/t/tricryptousdc-parameter-update/11172/1 "2026-09-09T11:39:51Z")

</div>

**Summary** :

Adjusting the parameters of TricryptoUSDC at _0x7f86bf177dd4f3494b841a37e810a34dd56c829b_ for better overall performance.

**Abstract** :

| Parameter | On-chain (live) | Candidate | Change |
| --- | --- | --- | --- |
| A | 1707629 | 821254 | ×0.481 |
| gamma | 0.000011809167829 | 0.0000332271078505 | ×2.814 |
| mid fee | 0.0300% | 0.2650% | ×8.835 |
| out fee | 0.300% | 0.379% | ×1.264 |
| fee gamma | 0.0005 | 0.0000431161565049 | ×0.086 |
| allowed extra profit | 0.000002 | 0.00000219407890927 | ×1.097 |
| adjustment step | 0.00049 | 0.000870625384729 | ×1.777 |

**Motivation** :

The pool currently charges ~0.10% average against a 0.03% floor, the proposed parameters charge ~0.36%, volume falls ~46%, but the revenue still more than doubles because the fee increase outruns the volume loss.

Total search space: 18,000 years of price history, stability tested against 8 randomised volatility profiles (for both BTC and ETH), with 3 years of onchain price tracking  
Underneath: Visualisation of the search path

 ![Screenshot 2026-09-08 at 11.37.08](http://gov.curve.finance/uploads/default/original/2X/3/3ab1ed9382f898c3b60b3cd2d5f7177cc877533e.jpeg)

Total swap fees $511k → $1.13M

 ![Screenshot 2026-09-08 at 11.37.31](http://gov.curve.finance/uploads/default/original/2X/a/aab6065709c173ac0277f72ff9a48b808fe194c3.png)

Dao Revenue x2.23

 ![Screenshot 2026-09-08 at 11.37.43](http://gov.curve.finance/uploads/default/original/2X/f/fb7f7b5e44f9e5687e3d84804b40672bd7d5a0f1.png)

Virtual Price x2.26

 ![Screenshot 2026-09-08 at 11.37.57](http://gov.curve.finance/uploads/default/original/2X/e/e76e0fcf90db0c8a8239c1190dcee9c79547beb6.png)

Max price\_scale deviation: unchanged (good)

 ![Screenshot 2026-09-08 at 11.40.26](http://gov.curve.finance/uploads/default/original/2X/2/24430b3385da70534d8ac4be08f8001ba6740d73.png)

Total Volume $603M → $325M, while AVG swap fee x3.68

 ![Screenshot 2026-09-08 at 11.40.36](http://gov.curve.finance/uploads/default/original/2X/5/5d6965a1853d6d1f85e5a9b21b2b4022d21a8eb3.png)

Average effective swap fee 0.098% → 0.361%

 ![Screenshot 2026-09-08 at 11.40.56](http://gov.curve.finance/uploads/default/original/2X/0/08bcd3a855b61c99e83ea3b5519597f89fdf3274.png)

Large zoom into price\_scale

 ![Screenshot 2026-09-08 at 11.41.32](http://gov.curve.finance/uploads/default/original/2X/c/ceb09d6113fb6887285b513ee19357cc84b541c6.png)

**Specification** :

```auto
now = <unix timestamp at vote creation>
future_time = now + 1209600 # 14 days

Call via agent (0x40907540d8a6C65c637785e8f8B742ae6b0b9968):
 ├─ To: 0x7f86Bf177Dd4F3494b841a37e810A34dD56c829B
 ├─ Function: ramp_A_gamma
 └─ Inputs: [('uint256', 'future_A', '821254'), ('uint256', 'future_gamma', '33227107850500'), ('uint256', 'future_time', 'now + 1209600')]

```

```auto
Call via agent (0x40907540d8a6C65c637785e8f8B742ae6b0b9968):
 ├─ To: 0x7f86Bf177Dd4F3494b841a37e810A34dD56c829B
 ├─ Function: commit_new_parameters
 └─ Inputs: [('uint256', '_new_mid_fee', '26505000'), ('uint256', '_new_out_fee', '37920000'), ('uint256', '_new_fee_gamma', '43116156504900'), ('uint256', '_new_allowed_extra_profit', '2194078909270'), ('uint256', '_new_adjustment_step', '870625384729000'), ('uint256', '_new_ma_time', '865')]

```