Increase USDtb/USDC fee from 0.01% to 0.02%

[phil_00Llama]

Summary:

Increase the trading fee of Curve Pool 0xc2921134073151490193ac7369313c8e0b08e1e7 from 0.01% to 0.02%, based on strong CowSwap order flow capture.

Abstract:

This proposal suggests increasing the fee of the Curve pool at 0xc292...1e7 to 0.02%. CowSwap trade routing data shows this pool captures 82.8% of all volume for its token pair, significantly ahead of alternatives. A fee increase would improve LP revenue while maintaining routing dominance.

Motivation:

In the past 30 days, the USDtb/USDC Curve pool has captured $34.2M of the $41.3M in CowSwap volume for this pair — roughly 82.8% of all trades.

This dominance indicates that solvers consistently route orders through the Curve pool, even in the presence of competing liquidity.

Below is a chart showing CowSwap order flow distribution by trade size, with Curve (yellow) capturing the majority of flow.

Increasing the fee to 0.02% is expected to:

• Increase LP revenue significantly

• Have minimal impact on routing behaviour

• Preserve Curve’s position as the preferred trading route for this token pair

Specification:

```
ACTIONS = [
(“0xc2921134073151490193ac7369313c8e0b08e1e7”, “set_new_fee”, 2000000, 50000000000)
]
```