The Securities and Exchange Commission (SEC) has proposed rescinding a 2005 rule that mandates trading platforms to execute buy and sell orders at the best possible price for customers. The proposal aims to remove what the agency describes as an outdated regulation.

The SEC's 2005 rule, often referred to as the "best execution" rule, required broker-dealers to make reasonable efforts to obtain the best execution reasonably available for their customers' orders. This involved considering various venues and pricing options to ensure the most favorable outcome for investors.

However, the commission now argues that the existing rule may no longer align with current market structures and practices. The proposed change reflects an effort to modernize regulations in response to the evolving landscape of financial markets and trading technologies.