本研究探討銀行多角化與經營績效之間的相關性,研究資料從台灣經濟新報(TEJ)與公開資訊觀測站中獲得,樣本起訖時間為2012年至2015年間,以台灣24家商業銀行為研究對象,包含金融控股銀行與非金融控股銀行,利用赫芬達爾指數(HHI)進行分析,首先將銀行的收益來源以業務別進行分類,衡量業務多角化的程度,接著衡量放款與存款業務的多角化程度,而後將利息與手續費以收入來源進行衡量多角化程度,探討銀行業務、存款與放款的多角化與利息及手續費之收入來源多角化是否會影響銀行的經營績效。實證結果顯示:銀行的多角化策略對權益資金成本並沒有顯著的影響,而業務多角化則與績效呈現顯著正相關,表示銀行所從事的業務越多元則越能夠提高銀行的績效,而手續費收入來源多角化則與績效呈現顯著負相關,代表銀行手續費產品的增加無法達到獲利的效果反而會使原有報酬造成損害。
This study examines the relationship between revenue diversification and bank performance. We obtain data from Taiwan Economic Journal Database (TEJ) and Market Observation Post System (MOPS) for the year 2012 to 2015. Sample includes holding and non-holding commercial banks in Taiwan. We use Herfindahl-Hirschman index (HHI) to measure diversification magnitude based on the business categories of banks. Our results present that bank diversification and cost of equity capital are not significant, in which business diversification and performance are positively correlated, which suggests that banks with diversified business have higher performance. However, the revenue diversification of fee products negatively relates to bank performance. The result suggests that banks engage in a variety of fee products do not increase bank performance.