> ## 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).

# Regulation D

Regulation that includes two SEC rules—Rules 504 and 506—that issuers often rely on to sell securities in unregistered offerings. Most private placements are conducted pursuant to Rule 506.