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The Effects of Large-scale Equity Purchases during the Coronavirus Pandemic

Author

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  • Shin-ichi Fukuda

    (Faculty of Economics, The University of Tokyo)

  • Mariko Tanaka

    (Musashino University)

Abstract

This study examines the effects of the Bank of Japan's (BOJ) large-scale equity purchases on the Nikkei 225 during the coronavirus (COVID-19) pandemic in 2020. Although the BOJ started equity purchases in 2010, the purchased amount reached unprecedented levels when the COVID-19 pandemic broke out. These large-scale purchases provide a natural experiment to examine how effective the central bank's equity purchases were in the crisis. Unlike previous studies, we investigate the equity purchase effects allowing for endogeneity. We first derive the BOJ's intra-day reaction function by estimating probit models. From this reaction function, we then calculate the BOJ's unexpected and expected equity purchases and examine their effects on the Nikkei 225 returns in the Tokyo Stock Exchange's afternoon session. We find that the BOJ's unexpected large-scale purchases had large positive instantaneous impacts on intra-day returns during the pandemic. However, the large positive impacts arose because most of the purchases came as big surprises to the markets. We argue that the policy would be effective only if the BOJ continues to surprise the market.

Suggested Citation

  • Shin-ichi Fukuda & Mariko Tanaka, 2022. "The Effects of Large-scale Equity Purchases during the Coronavirus Pandemic," CIRJE F-Series CIRJE-F-1186, CIRJE, Faculty of Economics, University of Tokyo.
    • Handle: RePEc:tky:fseres:2022cf1186
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    References listed on IDEAS

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    Cited by:

    1. Shirota, Toyoichiro, 2023. "State-dependent effects of the unconventional monetary policy in stock markets," Japan and the World Economy, Elsevier, vol. 67(C).

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