> For the complete documentation index, see [llms.txt](https://eako-capital.gitbook.io/eako-user-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://eako-capital.gitbook.io/eako-user-guide/variations-on-barrier-options/double-knock-out.md).

# Double Knock-Out

A Double Knock-Out is a Vanilla option that becomes ceases to exist (is "knocked-out") if the underlying spot breaches either one of two predetermined barriers before maturity.