# cSynths (Synthetic Assets) **What are cSynths?** Synthetic assets that are minted using the Sumero protocol are called cSynths. cSynths are tokenised derivatives contracts that can be minted and traded using the Sumero protocol. **What is a synthetic asset?** Synthetic assets are collateral**-**backed tokens whose value fluctuates depending on the token's reference index. **What is an underlying asset?** Underlying assets are the financial assets upon which a [derivative’s](https://www.investopedia.com/terms/d/derivative.asp) price is based. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.sumero.finance/frequently-asked-questions/faq-sections/csynths-synthetic-assets.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.