Regulators require higher margins for uncleared trades as they are seen as posing higher risks to the financial system.

Pressure will mount on all OTC participants from March 1, when all uncleared trades become subject to daily variation margin.

Margining requirements for uncleared trades were completed last year, making it possible for Basel to fine tune the rules for cleared trades on Thursday.

For uncleared trades, regulators want a global minimum margin in place starting January when tough new international capital rules start going into effect for banks.