We examine a range of mental health characteristics (e.g. depression, paranoia, and schizophrenia) in subjects engaged in simulated investment trading, showing that certain abnormal personality characteristics have a statistically significant association with the degree of investment...

We examine the short-term dynamic relation between the S&P 500 (Nasdaq 100) index return and changes in implied volatility at both the daily and intraday level. Neither the leverage hypothesis nor the volatility feedback hypothesis adequately explains the results. Alternatively, we propose that...