deferred acquisition costs (DAC), which included $20 million ($0.22 per share) inafter-tax,after-DAC net gains to adjust equity securities that the Company continued to own, to fair value. By comparison, AFG recorded net realized losses on securities of $8 million in the comparable 2017 period. The impact to our income statement will vary depending upon the level of volatility in the performance of the securities held in our equity portfolio and the overall market.
Unrealized gains on fixed maturities were $93 million, after tax, after DAC at September 30, 2018, a decrease of $526 million sinceyear-end. Our portfolio continues to be high quality, with 90% of our fixed maturity portfolio rated investment grade and 98% with a National Association of Insurance Commissioners’ designation of NAIC 1 or 2, its highest two categories.
For the nine months ended September 30, 2018, P&C net investment income was approximately 17% higher than the comparable 2017 period, and included unusually high returns of approximately 15% on certain private equity and limited partnership investments.
More information about the components of our investment portfolio may be found in our Quarterly Investor Supplement, which is posted on our website.
About American Financial Group, Inc.
American Financial Group is an insurance holding company, based in Cincinnati, Ohio with assets over $60 billion. Through the operations of Great American Insurance Group, AFG is engaged primarily in property and casualty insurance, focusing on specialized commercial products for businesses, and in the sale of traditional fixed, fixed-indexed and variable-indexed annuities in the retail, financial institutions, broker-dealer and registered investment advisor markets. Great American Insurance Group’s roots go back to 1872 with the founding of its flagship company, Great American Insurance Company.
Forward Looking Statements
This press release contains certain statements that may be deemed to be “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. All statements in this press release not dealing with historical results are forward-looking and are based on estimates, assumptions and projections. Examples of such forward-looking statements include statements relating to: the Company’s expectations concerning market and other conditions and their effect on future premiums, revenues, earnings, investment activities and the amount and timing of share repurchases; recoverability of asset values; expected losses and the adequacy of reserves for asbestos, environmental pollution and mass tort claims; rate changes; and improved loss experience.
Actual results and/or financial condition could differ materially from those contained in or implied by such forward-looking statements for a variety of reasons including, but not limited to: changes in financial, political and economic conditions, including changes in interest and inflation rates, currency fluctuations and extended economic recessions or expansions in the U.S. and/or abroad; performance of securities markets, including the cost of equity index options; new legislation or declines in credit quality or credit ratings that could have a material impact on the valuation of securities in AFG’s investment portfolio; the availability of capital; regulatory actions (including changes in statutory accounting rules); changes in the legal environment affecting AFG or its customers; tax law and accounting changes, including the impact of recent changes in U.S. corporate tax law; levels of natural catastrophes and severe weather, terrorist activities (including any nuclear, biological, chemical or radiological events), incidents of war or losses resulting from civil unrest and other major losses; disruption caused by cyber-attacks or other technology breaches or failures by AFG or its business
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