> For the complete documentation index, see [llms.txt](https://contango-2.gitbook.io/exchange/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://contango-2.gitbook.io/exchange/basics.md).

# Basics

- [What is Contango?](https://contango-2.gitbook.io/exchange/basics/what-is-contango.md)
- [What are expirables?](https://contango-2.gitbook.io/exchange/basics/what-are-expirables.md)
- [Why expirables?](https://contango-2.gitbook.io/exchange/basics/why-expirables.md)
- [Use cases](https://contango-2.gitbook.io/exchange/basics/use-cases.md)