> For the complete documentation index, see [llms.txt](https://matrixdock.gitbook.io/matrixdock-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://matrixdock.gitbook.io/matrixdock-docs/english/announcements/stbt-custodian-and-conversion-fee-reduction-and-settlement-optimization.md).

# STBT Custodian & Conversion Fee Reduction and Settlement Optimization

STBT has added Superstate USTB to its underlying assets, enhancing diversification while maintaining full U.S. Treasury bill exposure.

An updated fee and settlement structure will take effect on 28 Apr 2026 (UTC+8):

* Mint: **USDC 0%, USDT 10 bps** ｜ T+0
* Redeem: **0%** ｜ T+0 (≤ USD 1M), T+2 (> USD 1M)
* Custodian fee: **reduced from 0.35% to 0.20% p.a.**

If you have any questions, please contact support.

Matrixdock Team