Wpływ pandemii COVID-19 na główne indeksy giełdowe na świecie

The aim of the study is to examine the impact of information on lockdown connected with COVID-19 on stock indexes. The hypothesis was: it is a strong impact of the lockdown announce-ment on stock indexes at the time of its announcement or cancelation. Panel event models were used to verify the hypothesis. The study used data from the Thomson Reuters Database for the period from 2.01.2019–10.05.2020. The analysis was based on the papers and reports on COVID-19 and the literature on behavioral finance.