To Share or Not to Share? Uncovered Losses in a Derivatives Clearinghouse Staff working paper 2016-4 Radoslav Raykov This paper studies how the allocation of residual losses affects trading and welfare in a central counterparty. I compare loss sharing under two loss-allocation mechanisms – variation margin haircutting and cash calls – and study the privately and socially optimal degree of loss sharing. Content Type(s): Staff research, Staff working papers JEL Code(s): G, G1, G19, G2, G21 Research Theme(s): Financial markets and funds management, Market functioning, Financial system, Financial stability and systemic risk, Money and payments, Payment and financial market infrastructures