This value is the Income Before Extraordinary Items divided by the Average Total Assets, expressed as a percentage. Average Total Assets is the average of the Total Assets at the beginning and the end of the period.
Formula:
ROA% = 100 * NetIncBXor / ( (a0 + a1)/2)
a0 = AstTot end of period
a1 = AstTot beginning of period
IMPORTANT: Quarterly values from Income & Cashflow statements are annualized to make the resulting factor more readily comparable with 12 month factors. The annualization is done by multiplying the quarterly figures by approximately 4 (depends on the actual number of days in the period).