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| Separating the Components of Default Risk: A Derivative-Based Approach (Job Market Paper) by Anh Le of New York University January 16, 2007 Abstract: In this paper, I propose a general pricing framework that allows the risk-neutral dynamics of loss given default (LQ) and default probabilities (λQ) to be separately and sequentially discovered. The key is to exploit the differentials in LQ exhibited by different securities on the same underlying firm. By using equity and option data, I show that one can efficiently extract pure measures of λQ that are not contaminated by recovery information. Equipped with this knowledge of pure default dynamics, prices of any defaultable security on the same firm with non-zero recovery can be inverted to compute the associated LQ corresponding to that particular security. Using data on credit default swap premiums, I show that, cross-sectionally, λQ and LQ are positively correlated. In particular, this positive correlation is strongly driven by firms' characteristics, including leverage, volatility, profitability and q-ratio. For example, 1% increase in leverage leads to .14% increase in λQ and .60% increase in LQ. These findings raise serious doubts about the current practice, by both researchers and practitioners, of setting LQ to a constant across firms. Previously titled: Credit Information from Equity Option Prices |
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