Since the 1990s, many large Japanese financial institutions, including insurance companies,
security companies, and banks, have aggressively promoted financial alliances along with
Mergers and Acquisitions (M&A). The business strategies of these financial institutions
have changed, not only in response to M&A but also due to financial alliances mainly. In
particular, large Japanese insurance companies and banks have engaged in equity tie-ups to
promote their business strategies.
In this paper, I empirically examine the short-term effects of the changing business
strategies of Japanese listed insurance companies, listed security companies, and listed banks.
By using event study and multiple regression analysis, I consider different market effects on
organizations in different financial business categories. In my analysis of new stock tie-ups,
based on the research of Altunbas and Marques (2008) on strategic factors, I examine the
strategic management factor, using regressions with the Standardized Cumulative Abnormal
Return (SCAR) as a dependent variable and eight strategic factors as independent variables.
I find that when information asymmetries exist between insurance companies and market
investors, market players cannot accurately estimate insurance liabilities or value insurance
companies.
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