tax expense for insurance benefits, claims and reserves in the Consolidated Statement of Income. Depending on the circumstances surrounding a change in the Loss Ratio, other pre-tax amounts reported in the Consolidated Statement of Income could also be affected, such as amortization of deferred acquisition costs and commission expense.
The nature and quality of insurance company investments must comply with all applicable statutes and regulations, which have been promulgated primarily for the protection of policyholders. Although the Company's gross unrealized losses on available-for-sale securities totaled $6.3 million at December 31, 2014, approximately 99.8% of the Company’s fixed maturities were investment grade and continue to be rated on average AA. The Company marks all of its available-for-sale securities to fair value through accumulated other comprehensive income or loss. These investments tend to carry less default risk and, therefore, lower interest rates than other types of fixed maturity investments. At December 31, 2014, approximately 0.2% (or $1.0 million) of the carrying value of fixed maturities was invested in non-investment grade fixed maturities (a commercial mortgage obligation). Investments in such securities have different risks than investment grade securities, including greater risk of loss upon default, and thinner trading markets. The Company does not have any non-performing fixed maturity investments at December 31, 2014.
Management uses a significant amount of judgment in estimating the fair value of the Company’s reporting units. The key assumptions underlying the fair value process are subject to uncertainty and change. The following represent some of the potential risks that could impact these assumptions and the related expected future cash flows: (i) increased competition; (ii) an adverse change in the insurance industry and overall business climate; (iii) changes in state and federal regulations; (iv) rating agency downgrades of our insurance companies; and (v) a sustained and significant decrease in our share price and market capitalization. Our market capitalization as of December 31, 2014 was below the sum of our reporting units’ fair values. As a result, the Company assessed the factors contributing to the performance of IHC stock in 2014, and concluded that the market capitalization does not represent the fair value of the Company. The Company noted several factors that have led to a difference between the market capitalization and the fair value of the Company, including (i) the Company’s stock is thinly traded and a sale of even a small number of shares can have a large percentage impact on the price of the stock, (ii) Geneve Corporation and insiders own approximately 57% of the outstanding shares, which has had a significant adverse impact on the number of shares available for sale and therefore the trading potential of IHC stock, and (iii) lack of analyst coverage of the Company. If we experience a sustained decline in our results of operations and cash flows, or other indicators of impairment exist, we may incur a material non-cash charge to earnings relating to impairment of our goodwill, which could have a material adverse effect on our results.