The financial results for each of the last eight quarters are summarized above. In general, CWB's performance reflects a relatively consistent trend, although the second quarter contains three fewer revenue-earning days, or two fewer days in a leap year such as 2012.
The Bank's quarterly financial results are subject to some fluctuation due to its exposure to property and casualty insurance. Insurance operations, which are primarily reflected in other income, are subject to seasonal weather conditions, cyclical patterns of the industry and natural catastrophes. Mandatory participation in the Alberta auto risk sharing pools can also result in unpredictable quarterly fluctuations.
Among other things, quarterly results can also fluctuate from the recognition of periodic income tax items.
For additional details on variations between the prior quarters, refer to the summary of quarterly results section of the Bank's MD&A for the year ended October 31, 2012 and the individual quarterly reports to shareholders which are available on SEDAR at www.sedar.com and on CWB's website at www.cwbankgroup.com.
Taxable Equivalent Basis (teb)
Most banks analyze revenue on a taxable equivalent basis to permit uniform measurement and comparison of net interest income. Net interest income (as presented in the consolidated statement of income) includes tax-exempt income on certain securities. Since this income is not taxable, the rate of interest or dividends received is significantly lower than would apply to a loan or security of the same amount. The adjustment to taxable equivalent basis increases interest income and the provision for income taxes to what they would have been had the tax-exempt securities been taxed at the statutory rate. The taxable equivalent basis does not have a standardized meaning prescribed by IFRS and, therefore, may not be comparable to similar measures presented by other banks. Total revenues, net interest income and income taxes are discussed on a taxable equivalent basis throughout this quarterly report to shareholders.
Taxable equivalent basis, adjusted cash earnings per common share, return on common shareholders' equity, return on assets, efficiency ratio, net interest margin, common equity Tier 1, Tier 1 and total capital adequacy ratios, and average balances do not have standardized meanings prescribed by IFRS and therefore may not be comparable to similar measures presented by other financial institutions. The non-IFRS measures used in this MD&A are calculated as follows:
-- taxable equivalent basis - described above;-- adjusted cash earnings per common share - diluted earnings per common share excluding the after-tax amortization of acquisition-related intangible assets and the non-tax deductible change in fair value of contingent consideration. These exclusions represent non-cash charges mainly related to the acquisition of National Leasing Group Inc. and are not considered to be indicative of ongoing business performance;-- return on common shareholders' equity - annualized net income available to common shareholders divided by average common shareholders' equity;-- return on assets - annualized net income available to common shareholders divided by average total assets;-- efficiency ratio - non-interest expenses divided by total revenues excluding the non-tax deductible change in fair value of contingent consideration;-- net interest margin - net interest income divided by average total assets;-- Basel II Tier 1 and total capital adequacy ratios - in accordance with guidelines issued by OSFI;-- Basel III common equity Tier 1, Tier 1 and total capital ratios - in accordance with guidelines issued by OSFI; and-- average balances - average daily balances.