복합금융그룹화가 소속 금융회사의 부실위험에 미치는 영향
The Effect of Financial Conglomeration on the Default Risk of Financial Companies：Evidence from the Korean Financial Industry
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본 논문에서는 복합금융그룹화가 해당 그룹소속 개별금융회사의 부실위험에 미치는 영향을 2003년 12월(4분기)부터 2006년 12월까지(4분기)까지 국내 복합금융그룹 및 개별금융회사의 분기별 재무자료를 이용하여 검증하였다. 검증을 위해 개별기반 부실위험측도인 Z-index와 가중규제자본비율이 복합금융그룹소속 금융회사들과 비금융그룹 금융회사들 간에 유의적인 차이가 있는지를 통합 및 패널 회귀분석을 이용해 분석하였다. 주요 분석결과는 다음과 같다. 첫째, Z-index와 가중규제자본비율을 비교․분석한 결과, 복합금융그룹 소속 금융회사들의 부실위험이 비금융그룹 금융회사들에 비해 유의적으로 낮은 것으로 나타난다. 둘째, 두 그룹 간에 나타난 부실위험의 차이는 분석기간 초기에는 유의적이지 않지만, 최근으로 올수록 유의성이 높아진다. 셋째, 개별금융회사의 부실위험에 대해 소속된 금융그룹의 대형화, 다각화 및 그룹화 지표가 유의적으로 영향을 미치는 것으로 나타난다. 먼저 그룹화 효과의 경우 비록 단변량 비교에서는 복합금융그룹의 부실위험이 낮게 나타나지만, 부실위험에 영향을 미치는 다른 요인들의 효과를 통제하는 경우 개별금융회사의 그룹소속여부는 해당금융회사의 부실위험에 부정적인 영향을 미치는 것으로 나타난다. 그러나 이러한 부정적인 영향은, 해당복합금융그룹의 대형화 및 다각화 특성으로 인해 다소 완화되는 것으로 나타난다. 따라서 단일변량분석에서 드러난 복합금융그룹의 낮은 부실위험은 주로 해당그룹의 대형화로 인한 규모의 경제효과와 다각화에 따른 범위의 경제효과로부터 비롯되는 것으로 판단된다.
Abstract
Financial conglomerates combine banking, securities, insurance and other financial services within a single economic entity. In this paper we analyze the effect of financial conglomeration on the default risk of financial companies in the Korean financial industry. We use two risk measures based on individual company level as proxies of the default risk, one is Z-index proposed by Altman(1968) and the other is the weighted capital adequacy ratio. We find that financial conglomeration has a negative effect on the default risk of financial companies. The asset size and diversity level of financial conglomerates, however, are negatively correlated with the default risk of financial companies. These results mean that in the Korean financial industry, even though the economy of scale and scope does exist, financial conglomeration does not translate into lower risk of financial companies composing financial conglomerates.
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