Banks are planning to ask regulators for capital relief during attempts to move roughly $370 trillion in swaps notional away from Libor to new interest rate benchmarks.

Under incoming market risk capital rules – the Fundamental Review of the Trading Book – banks that model their own requirements will face a capital add-on for all risk factors not backed by a minimum level of trading. Studies have estimated these less-liquid portions of the portfolio could account for 30% of the total capital