Abstract
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 by IT failures in the hotel’s business operations (reservation, payment, technical systems) and supply chain processes, which result in financial losses. We also observe a highest negative stock market reaction for hotel companies located in Western countries and for hotels with a low cyber risk rating. Finally, this study identifies hotel-specific characteristics that drive value during an IT outage. The research evidence that larger and more profitable hotel companies, with lower leverage and higher cyber risk ratings are more resilient to the adverse effects of IT outages.
Introduction
The cybersecurity firm CrowdStrike reported on 19 July, 2024, a flaw in its Falcon Sensor security software that caused widespread problems for Microsoft Windows computers using this software. Thus, around 8.5 million systems experienced crashes and were unable to restart, marking the major outage in information technology history. 1 The estimated financial damage worldwide is $10 billion. 2
In recent years, investments in technology triggered by digital transformation mean that one of the threats to which the hotel industry is exposed is technological outages (Arcuri et al., 2020; Demir and Demir, 2024; Rasoulian et al., 2023). According to the authors, the collapse of technological systems (outage or cyberattack) can instantly stop businesses’ production and service delivery capacity, leading to significant financial losses. Unlike natural disasters that primarily affect the places where they occur, IT outages negatively affect the global scale.
In this study, we investigate the short-term effects caused by CrowdStrike IT outage on the largest listed worldwide hotel companies. Two recent studies analysed the effects caused by the CrowdStrike IT outage on the tourism and aviation industries. Demir and Demir (2024) analysed tourism-related news on websites and conducted interviews with tourism professionals to analyse the effect of the CrowdStrike IT outage on the tourism industry. Grebe et al. (2024) utilized the event study methodology in the aviation industry to evidence that the unexpected CrowdStrike IT outage resulted in short-term negative abnormal returns. This research differs from the previous in two ways: first, to our best knowledge, it is the first study that analyse the effect of CrowdStrike IT outage on the largest listed worldwide hotel companies; second, it extends the literature by adding new determinants of abnormal returns, such as location and cyber risk rating, not covered in previous studies.
Therefore, our research fills a critical gap in the understanding of the short-term market impact of CrowdStrike IT outage on hotel companies. It is the first study that analyse the impact caused by the largest IT outage in history on worldwide hotel companies, highlighting the hotel-specific characteristics that emerge as value drivers around IT failures.
By employing the event study methodology focused on the 100 major publicly listed hotels worldwide, we show a statistically significant negative stock price reaction for hotel companies associated with the CrowdStrike IT outage date. This finding underscores the sensitivity of hotel stock prices to external IT disruptions, highlighting the importance of robust technological resilience in the industry. Our results also evidence a highest negative stock market reaction for hotel companies located in Western countries and those with a low cyber risk rating (classified in terms of cyber risk in the “basic” category). Finally, this study reveals which specific characteristics of hotel companies act as value drivers during IT outages. The research evidence that larger, more profitable, higher cyber risk ratings and lower leverage hotel companies are more resilient to adverse effects caused by IT outages.
Impact of IT outages on the market value of hotel companies
In the hospitality industry, there has been an increase in investment in technology, with a clear focus on digital transformation and automation, which are referred to as valuable resources that strengthen competitive advantage by improving customer relationship management, integrating supply chains, integrating business processes (Ray et al., 2004), and thus improving operational efficiency (e.g., Bharadwaj et al., 2009; Demir and Demir, 2024).
A recent systematic review of the economic impacts of information and communication technologies (ICTs) in the tourism and hospitality industry (Lin et al., 2024), reveals the existence of economic positive impacts of ICTs in terms of performance (financial and operational), operational efficiency (e.g., cost reduction and operation time saving), and market (e.g., popularity and reputation). According to the authors, ICTs contribute to financial performance with contributions to financial metrics, such as sales volume, revenue, and gross operation income. ICT can also contribute to increasing the operational efficiency of hotels, through the facilitation of internal processes (e.g., Esparza-Aguilar et al., 2016) and back-of-house operational efficiency by reducing the time spent on repetitive tasks (e.g., Alrawadieh et al., 2021) and allowing employees to focus more on important tasks as ICTs can automate routine tasks (e.g., Melián-González and Bulchand-Gidumal, 2016). Finally, there may be market-related benefits, with ICTs enhancing the firms’ market share (e.g., Horng et al., 2022), as well as the aspects of customer behaviour influenced by these technologies (e.g., Liu et al., 2022).
However, when technologies fail, there are significant disruptions in the hotel’s business operations. The recent outage of CrowdStrike demonstrated this, with hotel managers mentioning that “
Despite the importance of studying the impact of IT outages on the stock market, empirical studies that address this issue are scarce. Anthony et al. (2006) examine how stock prices react to announcements of website outages and find a significant negative impact of website outages on a firm’s stock prices, whose negative impact is greater for firms with high earnings through internet business. Bharadwaj et al. (2009) investigate the effects of unexpected operating or implementation-related IT failures on firms’ market value. Their findings evidence that IT failures lead to a decline of 2% in average cumulative abnormal returns (CARs) around a 2-day event window. Benaroch et al. (2012) study the short-term market effects of IT operational risks. As explained by the authors, “
They conclude that investors perceive availability events as indicating the presence of more severe IT control weaknesses compared to those highlighted by confidentiality and integrity events. They conclude that investors recognize availability events as signalling the presence of more severe IT control weaknesses compared to those signalled by confidentiality and integrity events. Wang et al. (2023) employ event study methodology to study how online exposure to service failures impacts hotel revenue. The authors find that online exposure has a significant negative impact on hotel stock prices, which take mainly 9 months to fully recover. Finally, Grebe et al. (2024) analyse the short-term market effects of the unexpected CrowdStrike IT outage in the aviation industry. They find abnormal negative returns around the event date, and a quick recovery within a week.
There is, however, a broader set of empirical studies in the literature that analyse the effect caused by cyberattacks (largely focused on confidentiality events). Among the various empirical studies, we begin by mentioning the studies of Johnson et al. (2018) and Arcuri et al. (2020), that analyse the impact of cyberattacks on the stock market in the hospitality industry. The authors find negative abnormal returns of −0.043% (Arcuri et al., 2020) and −1.24% (Johnson et al., 2018) in the 3-day time window around cyberattack announcements. These findings align with the conclusions obtained by Spanos and Angelis (2016) and Ali et al. (2021) through their systematic literature review. Ali et al. (2021) highlighted that 75% of studies on information security events show significant negative CARs and that such effects are mainly observed within 2 days before and after the event date. Lastly, Kamiya et al. (2021)’s landmark empirical study about the stock market impact of cyberattacks and find that cyberattacks that don’t result in the loss of personal financial information tend to have a minimal adverse impact on shareholder wealth.
The main objective of this research is to analyse the short-term market effect of major outages in the history of information technology (CrowdStrike IT outage) on the 100 largest listed worldwide hotel companies. Therefore, our research hypothesis is the following: Null Hypothesis (H0): The CrowdStrike IT outage doesn’t affect the short-term market value of hotel companies.
Additionally, we are also interested in finding out if the location and hotel’s cyber risk rating affect the abnormal returns around the IT outage. It is expected that the negative effects caused by the CrowdStrike IT outage are greater for hotel companies located in Western countries – CrowdStrike primarily serves customers in Western countries, and many Asian countries, like China, have developed their own operating systems, anti-virus platforms and payment systems to reduce reliance on Windows and associated products 4 and for firms with a low cyber risk rating - these firms tend not to have robust contingency plans and cybersecurity measures to enhance resilience and reduce vulnerability to future disruptions (e.g., Demir et al., 2023), and as such they are more exposed to adverse effects provoked by these events.
Finally, we also investigate which specific characteristics of hotel companies serve as value drivers during an IT outage.
Data and methodology
Listed hotel companies by country.
This table shows the 100 largest listed worldwide hotel companies by country. “# Hotels” means the number of listed hotel companies.
To evaluate the research hypothesis presented in the preceding section, we apply the standard abnormal return (ARs) technique based on the market model.
5
The market model ARs are measured as the residual returns from estimating the following regression equation:
We use the event date of July 19, 2024, to calculate the abnormal returns. ARs are obtained by the difference between the observed returns of hotel company
The event date is nominated as day Event timeline. The figure illustrated the event timeline used to compute ARs around the CrowdStrike IT outage for the largest 100 listed worldwide hotel companies.

We examine seven distinct time intervals for the CARs: [−1, 1], [−1, 5], [−1, 10], [0, 2], [0, 3], [0, 5] and [0, 10]. Finally, for each time interval, we calculate the cumulative average abnormal returns (CAARs) using the following specification:
Regarding the analysis of abnormal returns differences between hotel companies based on the location (Asia vs non-Asia) and cyber risk rating, we calculate the CAARs and their differences for each portfolio. The statistical significance of the differences obtained for the portfolios is analysed based on a two-sample
Determinants of CARs: definition of variables and expected relationships.
This table displays the notation, definitions, and expected effect of explanatory variables in equation (5) on the hotel’s cumulative abnormal returns (CARs). “No” means the absence of a statistically significant effect.
Descriptive statistics of CARs, explanatory variables and ARs tests.
This table offers descriptive statistics of cumulative abnormal returns (CARs) and explanatory variables, as well as the outcomes from tests on abnormal returns. The firm-specific variables are computed from accounting data based in the prior year-end. These explanatory variables are defined on Table 2.
Results
Abnormal returns
Table 3 shows evidence of the hotel companies’ CARs around the CrowdStrike IT outage. The results show a statistically significant negative reaction in stock price to the announcement for the seven-time intervals. The table presents CARs of −0.899%, −1.413%, −3.690%, −0.444%, −0.514%, −0.831% and −2.846% for the time window [−1; 1], [−1; 5], [−1; 10], [0; 2], [0; 3], [0; 5], and [0; 10], respectively. The parametric (
Hotel companies’ CAARs by location and cyber risk rating and difference test for CAARs.
This table offers the hotel companies’ cumulative average abnormal returns (CAARs) around the CrowdStrike IT outage and the differences analysis in the CAARs for two hotel companies subsamples: (
Cross-sectional analysis
Cross-sectional analysis.
This table offers the cross-sectional estimation for the 100 largest listed hotel companies CARs’ around the CrowdStrike IT outage. The dependent variables are the hotel’s CARs for two different time windows: [−1; +1] and [−1; +5], computed using the market model (MM). The firm-specific and explanatory variables are computed from accounting data based in the prior year-end. These explanatory variables are defined on Table 2. ***, ** and * means statistical significance at the 1%, 5% and 10% level, respectively. Standard errors adjusted for heteroskedasticity and clustering at the country level are reported in parentheses. # Obs. denotes the number of observations used in the estimation.
From a reputational perspective, larger hotel companies with strong brand names and resources tend to recover more easily from an IT outage. This reputational advantage is likely to lessen the effects of losses experienced by worldwide large hotel companies (Murphy et al., 2009; Rasoulian et al., 2023). Additionally, the literature reveals that hotel companies with low levels of debt and a high capacity to generate profits tend to have the financial resources to recover from the negative effects caused by IT outages/crises more easily (Kamiya et al., 2021; Rasoulian et al., 2023). Regarding the
Concluding remarks
This research examines the short-term market effect of CrowdStrike IT outage in the 100 major listed worldwide hotel companies. The results evidence that hotel companies experienced statistically significant negative abnormal returns around the event date. While IT technologies enhance a hotel company’s operational efficiency, its failures tend to have an adverse impact on the hotel companies’ business operations, supply chain processes, and stakeholders’ confidence, which results in financial losses. Our analyses also reveal the existence of a strong negative stock market reaction for hotel companies placed in Western countries and for hotel companies with a low cyber risk rating. Finally, this study offers insights into the hotel characteristics that serve as value drivers during an IT outage. The study evidences that hotel companies with larger capitalization, higher profitability, elevated cyber risk rating, and lower leverage are more resilient to adverse effects caused by IT outages.
These results reveal that hospitality businesses must balance their investments in IT technology and digital transformation with the need for robust contingency planning and cybersecurity investments to increase resilience and reduce vulnerabilities to future IT outages.
While this research provides insightful implications, it is important to keep in mind its limitations, which may open new avenues for future research. First, like most event studies, our results only address the short-term market reaction to the CrowdStrike IT outage. Consequently, an analysis of the long-term effects in terms of returns and volatility of hotel companies could be of interest. Second, our study may be limited by its context-specific findings, which might not be generalisable across other tourism and hospitality sectors. As highlighted by Demir and Demir (2024), the unique characteristics of the tourism and hospitality industry, such as its high reliance on technology for booking, customer service, and operational management, may not fully represent other sectors with different technological dependencies and resilience capabilities. Future studies should extend the investigation to other tourism and hospitality sectors to validate and expand the empirical and theoretical implications of IT disruptions.
Footnotes
Declaration of conflicting interests
The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
Funding
The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This paper is financed by Portuguese national funds through FCT – Fundação para a Ciência e a Tecnologia, I.P., projects numbers UIDB/00685/2020 & UID00685 CEEAplA | University of Madeira (António Martins); UIDB/04007/2020 (Susana Cró) and UNIAG, UIDB/04752/2020 and UIDP/04752/2020 (Nuno Moutinho).
