Rule

1.

An individual law or regulation, or a broader principle underpinning a number of laws or regulations.

For example, the best execution rule.

2.

A less formal understanding, not necessarily legally enforceable.

For example, the Chatham House Rule.

See also

• Anti-avoidance rule = anti-avoidance provision
• Best execution rule
• Chatham House Rule
• Filter rule
• Liikanen rule
• Loss-sharing rule
• Overall Liquidity Adequacy Rule (OLAR)
• Rule 144A
• Rule 2a-7
• Uncleared Margin Rule (UMR)