TY - UNPD A1 - Kostopoulos, Dimitrios A1 - Meyer, Steffen A1 - Uhr, Charline T1 - Ambiguity and investor behavior T2 - SAFE working paper series ; No. 297 N2 - We relate time-varying aggregate ambiguity (V-VSTOXX) to individual investor trading. We use the trading records of more than 100,000 individual investors from a large German online brokerage from March 2010 to December 2015. We find that an increase in ambiguity is associated with increased investor activity. It also leads to a reduction in risk-taking which does not reverse over the following days. When ambiguity is high, the effect of sentiment looms larger. Survey evidence reveals that ambiguity averse investors are more prone to ambiguity shocks. Our results are robust to alternative survey-, newspaper- or market-based ambiguity measures. T3 - SAFE working paper - 297 KW - ambiguity KW - uncertainty KW - individual investor KW - trading behavior Y1 - 2020 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/55282 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-552824 PB - SAFE CY - Frankfurt am Main ER -