> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://biasinvestors.crisp.help/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Index Option

Option contracts traded on an underlying index—for example, the S&P 100 (OEX), Major Market Index, and NYSE Index Option Contracts.