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Stock market effects of CrowdStrike IT outage on largest listed hotel companies

Albuquerque, Bruno; Cró, Susana; Moutinho, Nuno; Martins, António Miguel

This study analyses the short-term market effect of CrowdStrike IT outage in the 100 largest worldwide listed hotel companies. Using an event study methodology, the paper analyses how hotel companies are penalized by the market to the biggest IT disruption in history. Our results evidence a statistically significant negative reaction around the event date. This result is explained by the adverse impact caused b...

Date: 2025   |   Origin: Biblioteca Digital do IPB

Airline stock market reaction to CrowdStrike IT outage: an event study analysis

Costa, João; Cró, Susana; Moutinho, Nuno; Martins, António Miguel

This study investigates the short-term market effect of CrowdStrike IT outage in the airline industry. Using an event study methodology, we evidence that airline stocks respond significantly negatively to the technology disruption within two days before and after the event day. IT disruptions, by creating friction in daily operations, such as broken schedules, delayed or cancelled flights, negative externalitie...

Date: 2025   |   Origin: Biblioteca Digital do IPB

2024 U.S. presidential elections: an event study for U.S. and non-U.S. fossil f...

Martins, António Miguel; Albuquerque, Bruno; Sardinha, Luís; Moutinho, Nuno; Martins, António; Albuquerque, Bruno; Sardinha, Luis

This study examines the short-term market effect of Donald Trump’ victory in the 2024 US presidential election on largest US and non-US listed worldwide fuel fossil and renewable firms. Employing an event study meth odology, we observe a negative and statistically significant stock price reaction for worldwide renewable listed firms. An analysis by economic zones reveals the existence of negative abnormal retur...


Presidential elections and secretary appointment: an event study for us biotech...

Martins, António Miguel; Albuquerque, Bruno; Sardinha, Luís; Moutinho, Nuno; Martins, António; Albuquerque, Bruno; Sardinha, Luis

The aim of this study is to analyse the effect of the 2024 US presidential election and the appointment of the US health secretary to the largest US listed biotechnology and drug firms. Using an event study methodology, we find that President Donald Trump’s election had no sig nificant impact on the industry. On the contrary, the results show statistically significant negative stock price reactions around the U...


The collapse of Silicon Valley Bank and Credit Suisse and their impact on other...

Martins, António Miguel; Martins, António

ABSTRACT This paper examines how US banking industry responded to the collapse of Silicon Valley Bank and Credit Suisse. The analysis of abnormal returns surrounding the announcement of the collapse of Silicon Valley Bank and Credit Suisse reveals a negative and statistically significant impact on the largest listed US banks. Banks’ market value loss is explained by information asymmetries and uncertainty retur...


Tourism activity affects house price dynamics? Evidence for countries dependent...

Cró, Susana; Martins, António Miguel; Martins, António

This study analyses the impact of tourism in house prices in eight tourism dependent countries in terms of exports for the period from 2000 to 2018. We employ a Vector-Error Correction Model (VECM) for the empirical estimation given that house prices, tourism activity and other determinants are cointegrated. The results indicate that tourism has a significant positive impact on house prices both in the short-ru...


Safety and security perception as strategic issues for hospitality companies

Cró, Susana; Calisto, Maria de Lurdes; Martins, António Miguel; Simões, José Manuel

Safety, tranquility, and peace are a necessary condition for prosperous tourism, and security has been identified as one of the five global forces that will drive the tourism industry in the new millennium. Numerous studies have demonstrated that tourism destinations are heavily affected by security perceptions and safety and risk management. In this chapter, the reader may learn about the theoretical models an...


Foreign Direct Investment in the tourism sector: the case of France

Cró, Susana; Martins, António Miguel

This study investigates the determinants of inward Foreign Direct Investment (FDI) stock in the French hospitality industry. A panel gravity model is applied to bilateral inward FDI stock between France and nineteen investor countries in Hotels and the Restaurant industry over 2000–2017. Results show that bilateral inward FDI stocks between France and investor countries are positively affected by their income a...


Effect of security on hostels’ price premiums: a hedonic pricing approach

Cró, Susana; Martins, António Miguel; Simões, José Manuel; Calisto, Maria de Lurdes

This article evaluates the impact of security in the hostel industry on the willingness to pay by customers. More specifically, given the importance of security in the decision to travel and in the choice of a given destination, we analyze the impact of security guest reviews on a consumer-generated website on hostel room prices. Furthermore, we investigate whether the impact of security guest reviews on the ho...


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