This article presents a model of haircuts and economic capital for repo. We propose a credit approach to solve haircuts such that the exposure to market riskmeets a prescribed credit rating scale measured by expected loss. Specifically for securities financing business, a credit risk capital approach is also adopted where the borrower dependent haircut is set to a level such that the resultant credit risk VaR is zero. The repo haircuts model incorporates asset risk, borrower credit risk, wrong way risk, and market liquidity risk. Double exponential jump-diffusion type processes are used to model single asset or portfolio price dynamics. Borrower credit is captured by a log-Ornstein-Uhlenbeck default intensity model. Economic capital defined either as unexpected loss from CVaR or expected shortfall is computed for securities financing transactions with negotiated haircuts, to form the basis to levy a capital charge in pre-trade and to fair value in post-trade. Numerical techniques employing two-sided Laplace transform inversion and maximum likelihood estimation of the jump-diffusion model are applied to compute haircuts of SPX500 index, US corporate bond and CMBS indices. Preliminary findings are that stress period calibrated jump-diffusion models can produce haircuts at the levels of BASEL's supervisory haircuts and that repo economic capital far exceeds expected loss and cost of capital has to be included in repo-style transactions pricing .
This article develops a haircut model by treating repos as debt investments and seeks haircuts to control counterparty contingent exposure to asset price gap risk. It corroborates well with empirically stylized facts, explains tri-party and bilateral repo haircut differences, recasts haircut increases during the financial crisis, and sets a limit on access liquidity dealers can extract while acting as funding intermediaries between money market funds and hedge funds. Once a haircut is set, repo's residual risk becomes a pricing challenge, as is neither hedgeable nor diversifiable. We propose a capital pricing approach of computing repo economic capital and charging the borrower a cost of capital . Capital charge is shown to be countercyclical and a key element of repo pricing and used in explaining the repo pricing puzzle and maturity compression phenomenon .
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presents a model of haircuts and economic capital for repo. We propose a credit approach to solve haircuts such that the exposure to market riskmeets a prescribed credit rating scale measured by expected loss. Specifically for securities financing business, a credit risk capital approach is also adopted where the borrower dependent haircut is set to a level such that the resultant credit risk VaR is zero. The repo haircuts model incorporates asset risk, borrower credit risk, wrong way risk, and market liquidity risk. Double exponential jump-diffusion type processes are used to model single asset or portfolio price dynamics. Borrower credit is captured by a log-Ornstein-Uhlenbeck default intensity model. Economic capital defined either as unexpected loss from CVaR or expected shortfall is computed for securities financing transactions with negotiated haircuts, to form the basis to levy a capital charge in pre-trade and to fair value in post-trade. Numerical techniques employing two-sided Laplace transform inversion and maximum likelihood estimation of the jump-diffusion model are applied to compute haircuts of SPX500 index, US corporate bond and CMBS indices. Preliminary findings are that stress period calibrated jump-diffusion models can produce haircuts at the levels of BASEL's supervisory haircuts and that
develops a haircut model by treating repos as debt investments and seeks haircuts to control counterparty contingent exposure to asset price gap risk. It corroborates well with empirically stylized facts, explains tri-party and bilateral repo haircut differences, recasts haircut increases during the financial crisis, and sets a limit on access liquidity dealers can extract while acting as funding intermediaries between money market funds and hedge funds. Once a haircut is set, repo's residual risk becomes a pricing challenge, as is neither hedgeable nor diversifiable. We propose a capital pricing approach of computing
R
far exceeds expected loss and
and charging the borrower a
R
has to be included in repo-style transactions pricing
. Capital charge is shown to be countercyclical and a key element of repo pricing and used in explaining the repo pricing puzzle and maturity compression phenomenon