In this paper, we consider the relationship of credit risk, interest
rates, volatility of consumer loan portfolio, and the firm size of consumer
financial agencies. If consumer financial agencies limit the range of their
customers, the number of borrowers of same credit risk will increase. Since
the volatility of a loan portfolio is inverse proportion to the number
of borrowers, portfolio’s diversification effect of small agencies are
weaker then that of large agencies in our model. In such a framework, small
agencies will need higher default premium, risk premium, and therefore,
higher interest rates.
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