Werner, Thomas; Upper, Christian - 2002
constant over time? (iii) If it is not, can we use the tail index as an indicator for financial market risk and does it add … value in addition to classical indicators? The answers to these questions are (i) yes, (ii) no, and (iii) yes. We find … significant heaviness of the tails of the Bund future returns. The tail index is on average around 3, implying the nonexistence of …