. banks are required to calculate an add-on to address potential maturity mismatches between contractual cash outflows and inflows within the 30-day period in determining the total amount of net outflows . the minimum lcr requirement is 90% ( 90 % ) effective january 2016 , increasing to 100% ( 100 % ) in january 2017 . the table below sets forth the components of citi 2019s lcr calculation and hqla in excess of net outflows as of the periods indicated : in billions of dollars dec . 31 , sept . 30 , dec