> ## 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).

# 401 (k) Plan

A type of qualified retirement plan in which employees make pretax contributions into an employee trust. In many cases, the employer will match employee contributions up to specified levels.