The following appeared in the Federal Reserve Bank of San Francisco's Economic Letter, January 25, 2002:

Financial institutions are in the business of risk management and reallocation, and they have developed sophisticated risk management systems to carry out these tasks. The basic components of a risk management system are identifying and defining the risks the firm is exposed to, assessing their magnitude, mitigating them using a variety of procedures, and setting aside capital for potential losses. Over the past twenty years or so, financial institutions have been using economic modeling in earnest to assist them in these tasks. For example, the development of empirical models of financial volatility led to increased modeling of market risk, which is the risk arising from the fluctuations of financial asset prices. In the area of credit risk, models have recently been developed for large-scale credit risk management purposes.

Yet, not all of the risks faced by financial institutions can be so easily categorized and modeled. For example, the risks of electrical failures or employee fraud do not kend themselves as readily to modeling.

What type of risk is the above quotation referring to?