This study investigates whether the existence or strength of any misreaction in the options market is affected by investor sophistication and investor sentiment. Based on a unique data set of the complete history of all transactions in the Taiwan options market, we find that individual investors exhibit significant misreaction to information and that this misreaction becomes stronger during periods of high investor sentiment. In addition, more active or aggressive individual investors always exhibit misreaction and do not learn from their past mistakes. Our empirical results are robust to alternative measures of investor sentiment and definitions of long- and short-term horizons.

This study follows the approach of Ni et al. [Ni, S.X., Pan, J., Poteshman, A.M., 2008. Volatility information trading in the option market. Journal of Finance 63, 1059–1091] – based upon the vega-weighted net demand for volatility – to determine whether volatility information exists within the Taiwan options market. Our empirical results show that foreign institutional investors possess the strongest and most direct volatility information, which is realized by the delta-neutral options/futures trades. In addition, a few individual investors (less than 1% of individuals’ trades) might be informed and realize their volatility information using the strangle strategy. Surprisingly, we find no evidence to support the predictive ability of the volatility demand from straddle trades, despite the widespread acknowledgement that such trades are sensitive to volatility.

In this paper, we set out to investigate the information content of options trading using a unique dataset to examine the predictive power of the put and call positions of different types of traders in the TAIEX option market. We find that options volume, as a whole, carries no information on TAIEX spot index changes. On the other hand, however, although foreign institutional investors do not engage in much trading, there is strong evidence to show that the trading in which they do engage has significant predictive power on the underlying asset returns. We also find that foreign institutional investors have greater predictive power with regard to in near-the-money and middle-horizon options.

The 2008 Apex Oil court decision reduced the circumstances under which specific environmental cleanup obligations were dischargeable in Chapter 11, potentially affecting the securities prices, credit conditions, and pollution practices of corporations not in Chapter 11. We discover that among financially stressed firms with those specific environmental liabilities, bond and stock prices dropped after Apex. Moreover, those firms (1) experienced a tightening of credit conditions (e.g., paying higher risk premia on debts and receiving lower bond ratings), (2) intensified pollution prevention activities, and (3) reduced the emissions of pollutants causing environmental damages no longer dischargeable in Chapter 11. These findings hold among firms nationwide, not only those within the jurisdiction of the Seventh Circuit court, which issued the Apex decision, suggesting that Apex had a nationwide impact.