Commonwealth Bank reported an unaudited net profit of A$1.9 billion for the March quarter (cash profit was the same), compared with a profit of $1.75 billion for the same quarter last year.The bank provided few details in its media release yesterday. Net interest margin was up as a result of loan re-pricing.Asset growth was funded by deposit growth. Deposit funding as a percentage of total funding rose from 63 per cent, in the December quarter, to 65 per cent in the March quarter.The bank's term funding tenor (average maturity) has increased from 3.7 to 3.8 years.Impairment expense was $255 million in the quarter, representing 19 basis points of total loans. The ratio of impairment to loans fell from 22 basis points in the December quarter.The value of impaired assets and past-due loans also fell.