Denna studie undersöker hur intäktsdiversifiering i europeiska bankverksamheter påverkar aktiemarknadens värdering och variationen i aktiepriserna. Europeiska bankverksamheter har sedan mitten på 1980-talet expanderat mot tjänster som genererar provisionsintäkter eftersom den historiska uppfattningen har varit att intäktsdiversifiering kan minska variationen i vinsterna och potentiellt öka marknadsvärderingen. Effekten av intäktsdiversifiering studeras utifrån OLS-regressioner på paneldata som består av 103 bankverksamheter från 24 länder i Europa för perioden 2005 till 2012. Aktiemarknadens värdering och variationen i aktiepriserna beräknas utifrån data över aktiepriser och från bankverksamheternas finansiella rapporter. Denna studie undersöker även resultatens ekonomiska signifikans för att utvärdera implikationerna av intäktsdiversifiering. Resultaten visar att en högre intäktsdiversifiering har en positiv effekt på aktiemarknadens värdering. Mer specifikt förväntar sig aktiemarknaden att ‘fee income’ har en positiv effekt på framtida vinster. Däremot innebär en högre intäktsdiversifiering även en högre variation i aktiepriserna. Den ekonomiska signifikansen visar att en högre intäktsdiversifiering främst har en betydande effekt på aktiemarknadens värdering och aktiens systematiska risk. Avslutningsvis framstår effekterna även ha varierat under tidsperioden och var större under den senaste finanskrisen. / This study examines how revenue diversification in European banks affects the market valuation and the total, systematic and idiosyncratic risk. Since the mid-1980s, European banks have expanded towards non-interest income generating activities. The historical perception has been that revenue diversification can reduce overall earnings volatility, potentially contributing to an increased market valuation. The effects of revenue diversification are examined by using OLS regressions on panel data containing 103 banks from 24 European countries over the period of 2005 to 2012. Stock market data and the data from banks’ financial statements are used to calculate market valuations and total, systematic and idiosyncratic risk. Additionally, this study examines the economic significance of the results in order to evaluate the implications of revenue diversification. The study finds a positive effect of revenue diversification on a bank’s market value. Specifically, the findings suggest that the stock market anticipates that ‘fee income’ can improve future profits. However, a higher degree of revenue diversification increases all types of risks. The economic significance reveals that revenue diversification has a considerable effect on the market valuation and the systematic risk. At last, the effects of revenue diversification appear to have varied over time and were greater during the recent financial crisis.

The significant change of the banking business models is easily observable in the current banking industry. Banks are forced to find additional source of income besides the one from traditional activities and thus the non-interest income is growing in importance. One of the reasons behind is that the banks need to recover from severe impacts of financial crisis in 2008-2010 and they want to adapt to the environment of low interest rates which has been occurring in the market since 2011. In this thesis, we analyze the presence of direct effect of non-interest income (proxied by fee income) on banks' performance using data of 220 commercial and investment banks from U.S. and EU-28 countries over the period of 2007-2014. Using System Generalized Methods of Moment, the direct effect was not detected. However, we conclude that economy with low inflation rate and growing gross domestic product improves the banks' profitability, as well as high capitalization and operating and credit quality efficiency. Furthermore, we found out that the volatility of the non-interest income has increased earlier than the crisis in 2008-2010 and it has been achieving almost continuous level till 2011 when it started decreasing again. Thus the hypothesis about relationship between volatility and financial crisis was rejected.