Prior literature shows that implied volatility spreads between call and put options are positively related to future underlying stock returns. In this paper, however, we demonstrate that the volatility spreads are negatively related to future out-of-the-money call option returns. Using unique data on option volumes, we reconcile the two pieces of evidence by showing that option demand by sophisticated, firm investors drives the positive stock return predictability based on volatility spreads, while demand by less sophisticated, customer investors drives the negative call option return predictability. Overall, our evidence suggests that volatility spreads contain information about both firm fundamentals and option mispricing. (JEL G12, G13, G14, L83)

We estimate probabilities of bankruptcy for 5784 industrial firms in the period 1988–2002 in a model where common equity is viewed as a down-and-out barrier option on the firm's assets. Asset values and volatilities as well as firm-specific bankruptcy barriers are simultaneously backed out from the prices of traded equity. Implied barriers are significantly positive and monotonic in the firm's leverage and asset volatility. Our default probabilities display better calibration and discriminatory power than the ones inferred in a standard Black and Scholes [Black, F., Scholes, M., 1973. The pricing of options and corporate liabilities. J. Pol. Econ. 81, 637–659]/Merton [Merton, R.C., 1974. On the pricing of corporate debt: the risk structure of interest rates. J. Finance 29, 449–470] and KMV frameworks. However, accounting-based measures such as Altman Z- and Z″-scores outperform structural models in 1-year-ahead bankruptcy predictions, but lose relevance as the forecast horizon is extended.