5-8
The relationship between these ratios and the firm’s return on equity is that ROE is simply equal
to the product of the operating margin, invested capital turnover, financial multiplier, and tax
effect.
c.
Note the drastic increase of the return on equity which nearly doubles between 2008 and 2010,
from 7.75 percent to 13.61 percent. This change in profitability can be attributed either to the tax
effect, a change in the financial policy or in the return on invested capital.
The return on invested capital (ROIC), which increased drastically from 11.34 percent in 2008 to
17.20 percent in 2010, was the main driver of the increase of the firm’s profitability during that
period. Furthermore, most of the ROIC increase comes from the operating margin which went up
from 2.94 percent in 2008 to 4.27 percent in 2010, while the invested capital turnover increased
only marginally from 3.86 to 4.03 during the same period.
d.