The Margin Investor is dedicated to delivering accurate and accessible information on margin investing. While this website discusses Reg T Margin, our primary focus is on exploring Portfolio Margin.  

Portfolio Margin rules were fully approved by the SEC in 2007, ushering in a new world of opportunities for retail investors. This website will teach you:

• What a margin account is and how Reg T works.
• What Portfolio Margin is and the genesis of Portfolio Margin regulations.  
• How Portfolio Margin is calculated.
• Why Portfolio Margin is desirable and its advantages over Reg T margin.
• How to structure your portfolio to obtain maximum borrowing under Portfolio Margin. 
• Pitfalls and tips on how to manage leverage under Portfolio Margin rules.