Underlying underwriting income is net earned premiums and fee income less claims and claim adjustment expenses (excluding catastrophe losses and prior year reserve development) and insurance-related expenses.

Average shareholders’ equity is (a) the sum of total shareholders’ equity at the beginning and end of each of the quarters for the period presented divided by (b) the number of quarters in the period presented times two.

Adjusted shareholders’ equity is shareholders’ equity excluding net unrealized investment gains (losses), net of tax, included in shareholders’ equity, net realized investment gains (losses), net of tax, for the period presented and the effect of a change in tax laws and tax rates at enactment (excluding the portion related to net unrealized investment gains (losses)). Adjusted average shareholders’ equity is (a) the sum of adjusted shareholders’ equity at the beginning and end of each of the quarters for the period presented divided by (b) the number of quarters in the period presented times two.

Return on equity is the ratio of (a) net income for the period presented to (b) average shareholders’ equity for the period presented. Core return on equity is the ratio of (a) core income for the period presented to (b) adjusted average shareholders’ equity for the period presented.

Definitions of other terms used in this Annual Report are included in the Glossary of Selected Insurance Terms portion of the Form 10-K.