Options on Leveraged Equity: Theory and Empirical Tests
构建了一个考虑公司税和破产成本的杠杆权益期权定价模型，解释了隐含波动率偏差与公司杠杆和债务契约的关系，并用大量公司的期权数据验证了模型预测的定价偏差。
ABSTRACT We develop an option pricing model for calls and puts written on leveraged equity in an economy with corporate taxes and bankruptcy costs. The model explains implied Black‐Scholes volatility biases by relating them to the firm's structural characteristics such as leverage and debt covenants. We test the model by comparing predicted pricing biases with biases observed in a large cross‐section of firms with liquid exchange traded option contracts. Our empirical study detects leverage related pricing biases. The magnitudes of these biases correspond to those predicted by our model. We also find significant pricing biases for firms financed primarily by short‐term debt. This supports our model because short‐term debt introduces net‐worth hurdles similar to net‐worth covenants.