Margin Rules and Margin Trading: Past, Present, and Implications
本文回顾了保证金交易的监管框架历史，综述了学术研究对保证金规则在资产定价和金融稳定方面影响的分析，并展望了组合保证金和中央清算等最新发展。
Margin—collateral or funds that investors deposit with their counterparties—is a crucial component of the practice of borrowing money to fund investment. While margin offers the potential for enhanced returns, it also exposes investors to the risk of escalated losses, thereby necessitating stringent regulatory oversight. Delving into the regulatory framework governing margin trading, we provide historical insights into the origins and dynamics of various margin requirements, and we review academic studies that illuminate the implications of these regulations for asset pricing, financial stability, and the design of margin rules. With an eye to the future, we also outline recent advancements in the evolving landscape of margin rules, such as portfolio margin and central clearing.