Discussion of Diluted Earnings per Share from Continuing Operations
Second quarter diluted earnings per share from continuing operations increased $0.13, or 144%, to $0.22 principally due to higher gross margin, lower foreign currency losses, a lower effective tax rate, and lower interest expense, partially offset by the loss on extinguishment of debt at the Parent Company.
For the six months ended June 30, 2013, diluted earnings per share from continuing operations decreased $0.18, or 33%, principally due to the loss on the early extinguishment of debt at the Parent Company and Masinloc, a lower gain on sale of investments in 2013 from the sale of the Company's remaining 20% interest in Cartagena compared to the prior gain from the sale of 80% of its interest in Cartagena in first quarter 2012 and lower gross margin, partially offset by lower tax expense, and lower interest expense.
Discussion of Cash Flow
Second quarter 2013 Proportional Free Cash Flow (a non-GAAP financial measure) was $148 million, a decrease of $65 million from second quarter 2012. This performance was driven by lower operating cash flow in Chile, due to a value-added tax refund in second quarter 2012, and an increase in environmental capital expenditures in the United States and Chile, as anticipated.
Second quarter 2013 Consolidated Net Cash Provided by Operating Activities was $567 million, a decrease of $13 million from second quarter 2012, driven by lower operating cash flow in Chile, as described above, partially offset by higher operating cash flow in Brazil, as a result of lower working capital requirements.
For the six months ended June 30, 2013, Proportional Free Cash Flow was $500 million, an increase of $52 million from the six months ended June 30, 2012, driven by higher operating cash flow in the United States, as a result of the Beaver Valley PPA termination payment, and in the Dominican Republic, as a result of lower working capital requirements. These positive trends were partially offset by lower operating cash flow in Chile and Colombia due to higher working capital requirements.