While operational excellence should be the lodestar guiding managers, there is a great temptation to use reserves to manage earnings. In order to ward off the effects of earnings management, ensure comparability across business, and reveal timing of recurring cash flows from operations, the change in LIFO reserves, other inventory reserves and loan loss reserves year-over-year are added to my calculation of net operating profit after tax (NOPAT).
David Trainer, CEO and founder of New Constructs, notes that,
Loan loss provisions can be manipulated to boost a company’s earnings by bleeding off reserves. Or they can cause problems when companies need to “catch up” and take big provisions to raise reserves to more appropriate levels.
Fannie Mae (FNMA) had the largest change in total reserves of any company for the fiscal year 2012. FNMA decreased its loan-loss provision from $72 billion in 2011 to $59 billion in 2012, despite increasing its total amount of loans outstanding. Under GAAP rules, FNMA is able to boost earnings by the amount of decrease in reserves as income. Meanwhile, the 2012 loan loss provision was $9.4 billion less than actual charge-offs.
David Trainer, Change in Total Reserves – NOPAT Adjustment