> For the complete documentation index, see [llms.txt](https://docs.lemma.finance/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.lemma.finance/concepts-overview/synthetic-tokens.md).

# Synthetic Tokens

LemmaSwap synthetic tokens are yield bearing ERC20s backed by spot assets and/or long perpetual positions with no leverage. For example, a synthetic ETH (ETH\*) can be backed by a long ETH/USD perpetual futures position and/or spot ETH.

There are two ways of minting synthetic tokens: 

* Deposit a spot asset. LemmaSwap will keep the asset in a collateral pool and mint a corresponding synthetic token. 
* Deposit USDC. LemmaSwap will use the USDC to go long with no leverage on a user chosen asset’s perpetual market and mint a corresponding synthetic token.