In a November 14, 2017 rule filing with the U.S. Securities and Exchange Commission (SEC), OCC proposed to establish a minimum cash contribution requirement for its Clearing Fund in order to increase the amount of highly liquid resources available to OCC to account for extreme scenarios that may result in liquidity demands exceeding OCC's current Cover 1 liquidity resources, as calculated under the current historically-based methodology, and provide for a more consistent level of cash resources in its available pre-funded financial resources.