Price-sensitive announcements and stock return anomalies: Evidence from Pakistan

Uddin, Faisal Sagheer; Azam, Muhammad

doi:10.1080/23322039.2020.1838692

Cited by 1 publication

(1 citation statement)

References 27 publications

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“…Event studies using a standard method of analysing stock price responses to news about dividends, earnings, stock splits and changes in accounting policies (Dasilas et al , 2009; Campbell and Ohuocha, 2011; El Ansary and El-Azab, 2017; Ferreira et al , 2019). While earlier research primarily emphasized financial aspects, recent research has broadened its scope to encompass nonfinancial announcements such as environmental impact (Flammer, 2013), corporate social responsibility ratings (Cellier and Chollet, 2011) or price-sensitive announcements concerning plant expansion, capital structure adjustments and change in ownership (Sagheer Uddin and Azam, 2020). Studies have also investigated the impact of general elections, Brexit, droughts and other significant events on the stock markets (Kabiru et al , 2015; Feria-Domínguez et al , 2017; Oehler et al , 2017).…”

Section: Literature Reviewmentioning

confidence: 99%

What determines the performance of pharmaceutical firms in India on account of COVID-19 interventions?

Lamba,

Aggarwal,

Gupta

et al. 2023

IJPHM

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Purpose This paper aims to examine the impact of announcements related to 77 interventions by 46 listed Indian pharmaceutical firms during COVID-19 on the abnormal returns of the firms. The study also finds the variables which explain cumulative abnormal returns (CARs). Design/methodology/approach This study uses standard event methodology to compute the abnormal returns of firms announcing pharmaceutical interventions in 2020 and 2021. Besides this, the multilayer perceptron technique is applied to identify the variables that influence the CARs of the sample firms. Findings The results show the presence of abnormal returns of 0.64% one day before the announcement, indicating information leakage. The multilayer perceptron approach identifies five variables that explain the CARs of the sample companies, which are licensing_age, licensing_size, size, commercialization_age and approval_age. Originality/value The study contributes to the efficient market literature by revealing how firm-specific nonfinancial disclosures affect stock prices, especially in times of crisis like pandemics. Prior research focused on determining the effect of COVID-19 variables on abnormal returns. This is the first research to use artificial neural networks to determine which firm-specific variables and pharmaceutical interventions can influence CARs.

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