IFin Seminar, Hasan Fallahgoul - Monash University "What Drives Jumps in Stock Returns? The Role of News and Disagreement"
Istituto di finanza
Data: 27 Settembre 2022 / 12:25 - 13:40
Speaker Hasan Fallahgoul, Monash University
Title What Drives Jumps in Stock Returns? The Role of News and Disagreement
Date September 27, 2022
Time 12:25 - 13:40
Room Zoom invitation
USI West Campus
Abstract
To explore determinants of jumps in stock returns, we decompose them into memoryless jumps (exogenous), jumps with memory from past jumps in stock (self-exciting), and market (cross-exciting). Using 164 million tweets from a social media investing platform, we find that in cross-section, disagreement and news tone are negatively related to the average jump intensity, while they have an opposite effect on jump-size distributions. Furthermore, a higher (lower) level of disagreement corresponds to a less (more) frequent exogenous and self-exciting jumps, while news tone is only related to self-exiting jumps (negatively). Finally, only investor attention (neither disagreement nor news tone) explains the jump intensity of cross-exciting jumps.
