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Aktieprisförändringar vid extrema händelser: Hur Pfizer och Modernas aktiekurser påverkades av pressmeddelanden rörande vaccinframtagningen för covid-19
Dalarna University, School of Culture and Society.
Dalarna University, School of Culture and Society.
Dalarna University, School of Culture and Society.
2021 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Changes in share prices during extreme events (English)
Abstract [en]

In late 2019, the spread of the coronavirus SARS-CoV-2 (Severe acute respiratory syndrome coronavirus 2) began. The viral disease, also known as covid-19, started spreading from China to large parts of the world in early 2020, resulting in a large number of cases, deaths, as well as major impacts on the economy of nations, organizations, and individuals alike. In order to limit the spread of the virus, several pharmaceutical companies, including Pfizer and Moderna, initiated a vaccine development. This process led pharmaceutical companies to communicat ea large amount of corporate news to investors, among other stakeholders. Previous research has shown how the stock market responds to corporate news. However, prior to this study, a lack of research on how the stock market behaves in relation to corporate news announced by companies under difficult global conditions was identified.

The aim of this study is to investigate the stock market's reaction to press releases by Moderna and Pfizer regarding their vaccine development for covid-19. The methods used to study the subject are based on analysis of historical share price data and the calculation of abnormal returns. The results have to some extent indicated that selected press releases have played a significant role as an influencer in relation to investor sentiment and the stock market’s behavior. In terms of the result as a whole, the number of significant days is not sufficient to support the alternative hypothesis. Market reactions in the share prices were identified on the dates surrounding the press releases regarding the vaccine-development, but since only 22 percent of the abnormal yield was significant, the result did not appear to be aligned with the alternative hypothesis.

Abstract [sv]

Under slutet av år 2019 började spridningen av coronaviruset SARS-CoV-2 (Severe acute respiratory syndrome coronavirus 2). Virussjukdomen, i folkmun känd som covid-19, började under år 2020 spridas från Kina till stora delar av övriga världen, vilket har resulterat i ett stort antal insjuknade, dödsfall och även en påverkan på såväl nationers som organisationers och individers ekonomi. För att begränsa spridningen av viruset påbörjade ett flertal läkemedelsbolag en vaccinframtagning. Denna process ledde till att läkemedelsbolagen kommunicerade en stor mängd bolagsnyheter till omvärlden, däribland investerare. Tidigare forskning har visat hur aktiemarknaden svarat på bolagsnyheter, men inför denna studie identifierades en brist på forskning kring hur aktiemarknaden agerar i förhållande till bolagsnyheter under extrema världssituationer likt coronaviruspandemin. Syftet med denna studie är att undersöka marknadens reaktion till följd av pressmeddelanden från företagen Moderna och Pfizer rörande vaccinutvecklingen för covid-19. Reaktionen studeras med hjälp av historiska aktiekursdata och beräkning av onormal avkastning. Resultaten har till en viss del indikerat på att utvalda pressmeddelanden har spelat en signifikant roll som påverkande faktor gentemot aktiemarknaden. Sett till resultatet i sin helhet är antalet signifikanta dagar inte tillräckligt för att utgöra stöd till alternativhypotesen. Marknadsreaktioner kunde identifieras till följd av pressmeddelanden om vaccinutvecklingen, men eftersom enbart 22 procent av den onormala avkastningen var signifikant så föreföll inte resultatet i linje med alternativhypotesen. 

Place, publisher, year, edition, pages
2021.
Keywords [en]
Share prices, Covid-19, External events, Financial news, Stock market, Vaccine, Pfizer, Moderna, Press release, Abnormal return, Coronavirus, Market model, Event study
National Category
Business Administration
Identifiers
URN: urn:nbn:se:du-37647OAI: oai:DiVA.org:du-37647DiVA, id: diva2:1578469
Subject / course
Business Administration and Management
Available from: 2021-07-06 Created: 2021-07-06

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