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- Kitap BölümüYalnız künye2025An analysis of factors affecting the market value of airline companies: An application in Borsa, Istanbul
Soydas, Safak Sonmez; Cam, Alper Veli
The market value of firms is mainly affected by financial factors. Financial factors such as sales, profitability, changes in equity, debt structure, competitiveness, interest rates, and inflation affect the market value of firms positively or negatively. Additionally, even if the financial data of firms are investable, some nonfinancial factors can significantly affect the market value of firms. Many nonfinancial factors, such as political and social events, natural disasters, technological developments, government policies, investor confidence or distrust (behavioral finance), managerial changes, sectoral developments, and social media, can change the market value of firms by having a greater impact on their stock prices. Determining the level and timing of the impact of these financial or nonfinancial factors will help institutional or individual investors in their investment decisions. The primary objective of this study is to identify the financial and nonfinancial factors affecting the market value of firms operating in the aviation sector. In this context, the factors affecting the market value of the firms were analyzed using the fundamental analysis data of three firms whose stocks are traded in Borsa Istanbul, one of the emerging markets. In the study, abnormal declines in stock prices of these firms were identified, and the importance levels of the factors that caused them were tried to be revealed. In this direction, a fundamental analysis was performed using financial data obtained from the financial statements of airline companies from the years 2014-2023. The events in the world and Turkey during the relevant periods that affected the capital markets were analyzed and compared. The results of the study are important for both domestic and foreign investors who will invest based on the market value of companies operating in the aviation sector.
- Kitap BölümüYalnız künye2025A theoretical framework of renewable energy financing
Soydas, Safak Sonmez
The renewable energy sector is an area that has received increasing attention in recent years and has significant growth potential worldwide. Factors such as limited traditional energy sources, environmental concerns, and climate change encourage using renewable energy sources. In this context, financing renewable energy companies has also gained great importance. Financing is a fundamental requirement for the implementation and expansion of renewable energy projects. However, the fact that renewable energy projects are generally high-cost and have long payback periods makes financing these projects difficult. Therefore, research on the financing of renewable energy companies is extremely important to understand and support the development of the sector. This study intends to ensure a theoretical viewpoint on the financing of renewable energy companies. The study will evaluate the general situation of the renewable energy sector, emphasize the importance of financing, and go over the impression of divergent financing sources on companies' growth strategies. Additionally, recommendations will be presented on the financing challenges faced by renewable energy companies and how these challenges can be overcome.
- Kitap BölümüYalnız künye2025Sentiment analysis of twitter data for US airlines' finance
Cam, Handan; Demirel, Ugur
The airline industry significantly promotes cultural, social, and financial globalization by facilitating connections between nations and individuals. Airline finance encompasses the intricate aspects of managing the economic, operational, and strategic elements of airline corporations on a global scale. In this industry, it is necessary to address various factors, including revenue management, risk management, cost control, and market competition. The interaction of these factors in the global aviation sector influences the financial situation of airlines, requiring strategic planning, flexibility, and a complete understanding of market dynamics. Sentiment analysis in aviation finance uses text and data mining techniques to examine emotional elements derived from social networks, consumer feedback, and news. This facilitates understanding consumer preferences, new trends, investment opportunities, risks, and marketing strategies. Sentiment analysis also helps manage brand reputation by monitoring sentiments expressed by passengers and the general public, allowing proactive measures to maintain a positive reputation. Airline companies rely on conventional customer feedback forms, which can be extremely laborious and timeconsuming. Twitter data is valuable for collecting consumer feedback tweets and conducting sentiment analysis. In this paper, we work on a dataset comprising tweets from the top major US airlines and perform a sentiment analysis in airline finance that can be used more efficiently and effectively in decision-making processes. This would allow airlines to adopt a more knowledgeable, targeted, and competitive strategy by understanding and assessing emotional context.