> For the complete documentation index, see [llms.txt](https://legacy-docs.usdd.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://legacy-docs.usdd.io/psm/how-to-swap-between-usdd-and-usdt-usdc-tusd-usdj-at-1-1-ratio-in-psm.md).

# How to swap between USDD and USDT/USDC/TUSD/USDJ at 1:1 ratio in PSM?

- [PSM(TDR)](https://legacy-docs.usdd.io/psm/how-to-swap-between-usdd-and-usdt-usdc-tusd-usdj-at-1-1-ratio-in-psm/psm-tdr.md)
- [PSM(USDD)](https://legacy-docs.usdd.io/psm/how-to-swap-between-usdd-and-usdt-usdc-tusd-usdj-at-1-1-ratio-in-psm/psm-usdd.md)
- [PSM(SUN)](https://legacy-docs.usdd.io/psm/how-to-swap-between-usdd-and-usdt-usdc-tusd-usdj-at-1-1-ratio-in-psm/psm-sun.md)