Apache Corp. (NYSE:APA)

The financial performance from 2005 to 2015 is characterized by extreme volatility in profitability and a severe deterioration of shareholder equity toward the end of the period.

Initial Stability and Growth (2005–2007)

Return on equity began at a high of 24.89% in 2005, followed by a gradual decline to 18.29% by 2007. During this phase, net income remained relatively stable, while total shareholders' equity grew consistently from 10.54 billion to 15.38 billion US dollars.

First Period of Contraction (2008–2009)

A sharp contraction in profitability occurred during this interval, with ROE dropping to 4.31% in 2008 and turning negative to -1.80% in 2009. This decline was primarily driven by a substantial decrease in net income, which culminated in a loss of 284 million US dollars in 2009, despite shareholders' equity remaining relatively stable.

Recovery and Normalization (2010–2013)

Profitability rebounded strongly in 2010 and 2011, with ROE peaking at 15.81% in 2011, coinciding with a net income high of 4.58 billion US dollars. However, from 2012 to 2013, ROE stabilized at a lower range between 6.39% and 6.68% as net income normalized around 2 billion US dollars and equity continued to expand to 33.40 billion US dollars.

Capital Erosion and Critical Loss (2014–2015)

The period concluded with a catastrophic decline in financial health. In 2014, ROE shifted to -20.83% following a net loss of 5.40 billion US dollars. By 2015, the situation intensified with a net loss of 23.12 billion US dollars. This massive loss caused total shareholders' equity to plummet from 25.94 billion to 2.57 billion US dollars. The simultaneous collapse of the equity base and the scale of the net loss resulted in an extreme ROE of -900.97%.