A significant source of risk is the possibility that losses will be sustained because borrowers, guarantors and related parties may fail to perform in accordance with the terms of their loan agreements. Most of the Corporation's loans are secured, but some loans are unsecured. With respect to secured loans, the collateral securing the repayment of these loans may be insufficient to cover the obligations owed under such loans. A significant portion of such collateral is real estate located in the Corporation's core banking markets. Collateral values may be adversely affected by changes in economic, environmental and other conditions, including declines in the value of real estate, changes in interest rates, changes in monetary and fiscal policies of the federal government, wide-spread disease, terrorist activity, environmental contamination and other external events. A decline in local economic conditions may have a greater effect on the Corporation's earnings and capital than on the earnings and capital of other financial institutions whose real estate loan portfolios are more geographically diverse. In addition, collateral appraisals that are out of date or that do not meet industry recognized standards may create the impression that a loan is adequately collateralized when it is not. The Corporation has adopted underwriting and credit monitoring procedures and policies, including regular reviews of appraisals and borrower financial statements, that management believes are appropriate to mitigate the risk of loss. Also, as discussed further in the "Provision and Allowance for Credit Losses" section of Management's Discussion and Analysis, the Corporation uses an expected loss methodology that is referred to as the current expected credit loss ("CECL") methodology. CECL requires an estimate of credit losses for the remaining estimated life of the financial asset using historical experience, current conditions, and reasonable and supportable forecasts. Such risk management and accounting policies and procedures, however, may not prevent unexpected losses that could have a material adverse effect on the Corporation's financial condition, results of operations or liquidity.
A significant portion of the Corporation's loan portfolio consists of commercial real estate loans, including owner occupied properties, non-owner-occupied properties, and other commercial properties. These types of loans are generally viewed as having more risk of default than residential real estate loans and depend on cash flows from the owner's business or the property's tenants to service the debt. The borrower's cash flows may be affected significantly by general economic conditions, a downturn in the local economy or in occupancy rates in the market where the property is located, or other external events, any of which could increase the likelihood of default. Commercial real estate loans also typically have larger loan balances, and, therefore, the deterioration of one or a few of these loans could cause a significant increase in the percentage of the Corporation's non-performing loans. An increase in non-performing loans could result in a loss of earnings from these loans, an increase in the provision for credit losses for loans, and an increase in charge-offs, all of which could have a material adverse effect on the Corporation's business, financial condition, and results of operations.
Over the past few years, the banking regulatory agencies have expressed concerns about weaknesses in the current commercial real estate market. Banking regulators generally give commercial real estate lending greater scrutiny and may require banks with higher levels of commercial real estate loans to implement enhanced risk management practices, including stricter underwriting, internal controls, risk management policies, more granular reporting, and portfolio stress testing, as well as possibly higher levels of allowances for credit losses and capital levels as a result of commercial real estate lending growth and exposures. If the Corporation's banking regulators determine that our commercial real estate lending activities are particularly risky and are subject to such heightened scrutiny, the Corporation may incur significant additional costs or be required to restrict certain of our commercial real estate lending activities. Furthermore, failures in the Corporation's risk management policies, procedures and controls could adversely affect our ability to manage this portfolio going forward and could result in an increased rate of delinquencies in, and increased losses from, this portfolio, which could have a material adverse effect on the Corporation's business, financial condition, and results of operations.