Global banking regulators watered down a key element of their plan for creating a safer financial system, giving ground to banks that argued the rules were unworkable and financially risky.

The Basel Committee on Banking Supervision, a group of the world's top regulators and central bankers, said Sunday that it agreed to relax a rule designed to ensure that big banks are able to weather financial crises without running short of cash. Bowing to two years of intense pressure from the banking industry, the regulators made it easier for banks to meet the rule, known as the "liquidity coverage ratio," and delayed its full implementation until 2019.