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Smart(Phone) Investing? A within Investor-time Analysis of New Technologies and Trading Behavior

Author

Listed:
  • Ankit Kalda
  • Benjamin Loos
  • Alessandro Previtero
  • Andreas Hackethal

Abstract

Using transaction-level data from two German banks, we study the effects of smartphones on investor behavior. Comparing trades by the same investor in the same month across different platforms, we find that smartphones increase purchasing of riskier and lottery-type assets and chasing past returns. After the adoption of smartphones, investors do not substitute trades across platforms and buy also riskier, lottery-type, and hot investments on other platforms. Using smartphones to trade specific assets or during specific hours contributes to explain our results. Digital nudges and the device screen size do not mechanically drive our results. Smartphone effects are not transitory.

Suggested Citation

  • Ankit Kalda & Benjamin Loos & Alessandro Previtero & Andreas Hackethal, 2021. "Smart(Phone) Investing? A within Investor-time Analysis of New Technologies and Trading Behavior," NBER Working Papers 28363, National Bureau of Economic Research, Inc.
    • Handle: RePEc:nbr:nberwo:28363
    Note: AG CF
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    Cited by:

    1. Hasso, Tim & Müller, Daniel & Pelster, Matthias & Warkulat, Sonja, 2022. "Who participated in the GameStop frenzy? Evidence from brokerage accounts," Finance Research Letters, Elsevier, vol. 45(C).
    2. Mark Marner-Hausen, 2022. "Developing a Framework for Real-Time Trading in a Laboratory Financial Market," ECONtribute Discussion Papers Series 172, University of Bonn and University of Cologne, Germany.
    3. Borsboom, Charlotte & Janssen, Dirk-Jan & Strucks, Markus & Zeisberger, Stefan, 2022. "History matters: How short-term price charts hurt investment performance," Journal of Banking & Finance, Elsevier, vol. 134(C).
    4. Rene Schwaiger & Markus Strucks & Stefan Zeisberger, 2024. "The Consequences of Narrow Framing for Risk-Taking: A Stress Test of Myopic Loss Aversion," Working Papers 2024-05, Faculty of Economics and Statistics, Universität Innsbruck.
    5. Cookson, J. Anthony & Niessner, Marina & Schiller, Christoph M., 2022. "Can Social Media Inform Corporate Decisions? Evidence from Merger Withdrawals," SocArXiv 56yrj, Center for Open Science.

    More about this item

    JEL classification:

    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • G40 - Financial Economics - - Behavioral Finance - - - General
    • G50 - Financial Economics - - Household Finance - - - General

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