26 we also include within our analysis “ premiums collected , ” another measure that is not used in financial statements prepared in accordance with gaap , but is a common life insurance industry measure of agent productivity . see note 13 to our consolidated financial statements included in item 8 for further information regarding this measure and its relationship to gaap revenues . our profitability is primarily a factor of : the volume of our life insurance and annuity business in force , which is driven by the level of our sales and the persistency of the business written . the amount of spread ( excess of net investment income earned over interest credited ) we earn on contract holders ' general account balances . our ability to price our life insurance products to earn acceptable margins over the cost of providing benefits and the expenses of acquiring and administering the products . competitive conditions , mortality experience , persistency , benefit utilization , investment results and our ability to maintain expenses in accordance with pricing assumptions drive our margins on the life products . on many products , we have the ability to mitigate adverse experience through adjustments to credited interest rates , policyholder dividends or cost of insurance charges . our ability to manage our investment portfolio to maximize investment returns while providing adequate liquidity for obligations to policyholders and minimizing the risk of defaults or impairments of invested assets . our ability to manage the level of our operating expenses . actual experience and changes in assumptions for expected surrender and withdrawal rates , mortality and spreads used in the amortization of deferred acquisition costs . our profitability is also impacted by changes in accounting guidance that impact the timing of profit recognition . see note 1 to our consolidated financial statements included in item 8 for details on adopted and pending accounting pronouncements . in addition to guidance that has been adopted , the accounting standards setting bodies are currently working on other projects that could impact the timing of profit emergence including the accounting for insurance contracts . it is uncertain what the outcome of these or other projects will be or when they will be completed . impact of recent business environment our business generally benefits from moderate to strong economic expansion . conversely , a lackluster economy characterized by higher unemployment , lower family income , lower consumer spending , muted corporate earnings growth and lower business investment could adversely impact the demand for our products in the future . we also may experience a higher incidence of claims , lapses or surrenders of policies during such times . we can not predict whether or when such actions may occur , or what impact , if any , such actions could have on our business , results of operations , cash flows or financial condition . economic and other environmental factors that may impact our business include , but are not limited to , the following : gross domestic product increased at an annual rate of 2.6 % during 2017 based on recent estimates . u.s. unemployment was estimated to be 4.1 % at year-end 2017. u.s. net farm income is estimated to have increased 2.7 % and farm real estate value is estimated to have increased 3.3 % during 2017 according to recent u.s. department of agriculture estimates . the u.s. 10-year treasury yield decreased during 2017 from 2.45 % at december 31 , 2016 to 2.40 % at december 31 , 2017. continued uncertainty as to actions the united states congress will take to address the national debt the pending department of labor fiduciary rule that expands the regulation of sales of insurance products used in retirement plans . see part 1 , item 1a for further discussion of this proposal . the enactment of the tax act during december 2017 may alter consumer demand for our insurance products . the low market interest rate environment continues to impact our investment yields as well as the interest we credit on our interest sensitive products . the benchmark 10-year u.s. treasury yield fluctuated during 2017 , reaching a high of 2.62 % in march and ultimately ending 2017 at 2.40 % , five basis points lower than year-end 2016. credit spreads continued to tighten during 2017. low crediting rates pose challenges to maintaining attractive annuity and universal life products , although our rates are comparable to other insurance companies , allowing us to maintain our competitive position within the market . we experienced an increase in the fair value of our fixed maturity security portfolio during 2017 primarily due to a decrease in market yields . see the segment discussion and “ financial condition ” section that follows for additional information regarding the impact of low market interest rates on our business . 27 results of operations for the three years ended december 31 , 2017 replace_table_token_11_th ( 1 ) amounts are net of adjustments , as applicable , to amortization of unearned revenue reserves , deferred acquisition costs and value of insurance in force acquired , as well as changes in interest sensitive product reserves and income taxes attributable to these items . ( 2 ) see note 13 to our consolidated financial statements . ( 3 ) average invested assets and annualized yield including , beginning in 2017 , investments held as securities and indebtedness of related parties ; 2016 and 2015 amounts have been adjusted for comparability . our net income increased in 2017 , compared to 2016 , primarily due to the initial impact of the tax act . net income and non-gaap operating income were positively impacted by increased earnings from an increase in the volume of business in force and the impact of unlocking , partially offset by increases in death benefits . story_separator_special_tag see note 5 to our consolidated financial statements included in item 8 for additional information regarding the tax act . 36 replace_table_token_24_th the level of realized gains ( losses ) is subject to fluctuation from period to period due to movements in credit spreads and prevailing interest rates , changes in the economic environment , the timing of the sales of the investments generating the realized gains and losses , as well as the timing of other than temporary impairment charges . during 2017 , we sold securities to reduce our exposure to a retailer and to the energy sector , resulting in realized losses of $ 0.9 million . during 2016 , we sold securities to decrease our exposure to the energy sector , resulting in realized gains of $ 3.9 million and realized losses of $ 8.4 million . see `` financial condition - investments `` and note 2 to our consolidated financial statements included in item 8 for details regarding our unrealized gains and losses on available-for-sale securities at december 31 , 2017 and 2016. we monitor the financial condition and operations of the issuers of securities rated below investment grade and of the issuers of certain investment grade securities for which we have concerns regarding credit quality that could potentially be other than temporarily impaired . see additional details regarding write downs and our methodology for evaluating investments for other-than-temporary impairment in notes 1 and 2 to our consolidated financial statements included in item 8. replace_table_token_25_th fixed maturity other-than-temporary credit losses for 2017 occurred in the construction sector due to an expected reduction in future revenue and the declining liquidity of an issuer . impairment charges were also recognized on securities and indebtedness of related parties as the tax act resulted in a change in the expected future tax benefits of lihtc entities . fixed maturity other-than-temporary credit losses for 2016 occurred within the energy sector due to a decline in credit of an issuer that led to a decrease in the expected future cash flows . other than temporary credit losses also occurred within residential mortgage-backed securities due to reduced reliance on insurance credit support , resulting in a decline in the present value of expected cash flows . fixed maturity other-than-temporary credit losses for 2015 occurred in the residential mortgage-backed sector due to changes in the amount and timing of future cash flows resulting in a decline in the present value . an impairment charge was also recognized on a real estate investment due to an appraisal declining below our current carrying value . 37 financial condition investments our investment portfolio increased 5.5 % to $ 8,620.2 million at december 31 , 2017 , compared to $ 8,174.7 million at december 31 , 2016 . the portfolio increased due to positive cash flows from operating and financing activities as well as an increase of $ 187.6 million of net unrealized appreciation of fixed maturities during 2017. additional details regarding securities in an unrealized gain or loss position at december 31 , 2017 are included in the discussion that follows and in note 2 to our consolidated financial statements included in item 8. details regarding investment impairments are discussed above in the `` realized gains ( losses ) on investments `` section under `` results of operations . `` we manage the investment portfolio to optimize risk-adjusted yield within the context of prudent asset-liability management . we evaluate multiple cash flow testing scenarios as part of this process . the company 's investment policy calls for investing primarily in high-quality fixed maturities and commercial mortgage loans . replace_table_token_26_th the table above summarizes selected information for fixed maturity purchases . the effective annual yield shown is the yield calculated to the `` worst-call date . `` for non-callable bonds , the worst-call date is always the maturity date . for callable bonds , the worst-call date is the call or maturity date that produces the lowest yield . the weighted-average life is calculated using scheduled pay-downs and expected prepayments for amortizing securities . for non-amortizing securities , the weighted-average life is equal to the stated maturity date . a portion of the securities acquired during 2017 and 2016 were acquired with the proceeds from advances on our funding agreements with the fhlb . the securities acquired to support these funding agreements often carry a lower average yield than securities acquired to support our other insurance products , due to the shorter maturity and relatively low interest rate paid on those advances . in addition , certain municipal securities acquired are exempt from federal income taxes , and accordingly have a higher actual return than reflected in the yields stated above . the average yield of the securities acquired , excluding the securities supporting the funding agreements and using a tax-adjusted yield for the municipal securities , was 3.95 % in 2017 and 4.39 % in 2016 . 38 replace_table_token_27_th as of december 31 , 2017 , 96.5 % ( based on carrying value ) of the available-for-sale fixed maturities were investment grade debt securities , defined as being in the highest two national association of insurance commissioners ( naic ) designations . non-investment grade debt securities generally provide higher yields and involve greater risks than investment grade debt securities because their issuers typically are more highly leveraged and more vulnerable to adverse economic conditions than investment grade issuers . in addition , the trading market for these securities is usually more limited than for investment grade debt securities . we regularly review the percentage of our portfolio that is invested in non-investment grade debt securities ( naic designations 3 through 6 ) . as of december 31 , 2017 , no single non-investment grade holding exceeded 0.2 % of total investments . replace_table_token_28_th ( 1 ) equivalent ratings are based on those provided by nationally recognized rating agencies with some exceptions for certain residential mortgage , commercial mortgage- and asset-backed securities that are based on the

cash flows during 2017 , our operating activities generated cash flows totaling $ 241.7 million , consisting of net income of $ 194.4 million adjusted for non-cash operating revenues and expenses netting to $ 47.3 million . we used cash of $ 235.4 million in our investing activities during 2017 . the primary uses were $ 974.6 million of investment acquisitions , mostly in fixed maturity securities , partially offset by $ 751.3 million in sales , maturities and repayments of investments . our financing activities provided cash of $ 12.8 million during 2017 . the primary financing source was $ 534.4 million in receipts from interest sensitive products credited to policyholder account balances , which was partially offset by $ 440.6 million for return of policyholder account balances on interest sensitive products and $ 81.4 million for dividends paid to stockholders . sources and uses of capital resources parent company cash inflows from operations consist primarily of fees that it charges various subsidiaries and affiliates for management of their operations , expense reimbursements and tax settlements from subsidiaries and affiliates , proceeds from the exercise of employee stock options , investment income and dividends from subsidiaries , if declared and paid . revenue sources for the parent company during 2017 included management fees from subsidiaries and affiliates totaling $ 7.8 million and dividends of $ 71.5 million .


 Write a concise suspicious activity report of the following text delimited by triple backquotes. Return your response as a formal report which covers the key points highlighting the location,dates,entity names and account holder information in chronological order of the text.
     ```cash flows during 2017 , our operating activities generated cash flows totaling $ 241.7 million , consisting of net income of $ 194.4 million adjusted for non-cash operating revenues and expenses netting to $ 47.3 million . we used cash of $ 235.4 million in our investing activities during 2017 . the primary uses were $ 974.6 million of investment acquisitions , mostly in fixed maturity securities , partially offset by $ 751.3 million in sales , maturities and repayments of investments . our financing activities provided cash of $ 12.8 million during 2017 . the primary financing source was $ 534.4 million in receipts from interest sensitive products credited to policyholder account balances , which was partially offset by $ 440.6 million for return of policyholder account balances on interest sensitive products and $ 81.4 million for dividends paid to stockholders . sources and uses of capital resources parent company cash inflows from operations consist primarily of fees that it charges various subsidiaries and affiliates for management of their operations , expense reimbursements and tax settlements from subsidiaries and affiliates , proceeds from the exercise of employee stock options , investment income and dividends from subsidiaries , if declared and paid . revenue sources for the parent company during 2017 included management fees from subsidiaries and affiliates totaling $ 7.8 million and dividends of $ 71.5 million .
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 Suspicious Activity Report : 26 we also include within our analysis “ premiums collected , ” another measure that is not used in financial statements prepared in accordance with gaap , but is a common life insurance industry measure of agent productivity . see note 13 to our consolidated financial statements included in item 8 for further information regarding this measure and its relationship to gaap revenues . our profitability is primarily a factor of : the volume of our life insurance and annuity business in force , which is driven by the level of our sales and the persistency of the business written . the amount of spread ( excess of net investment income earned over interest credited ) we earn on contract holders ' general account balances . our ability to price our life insurance products to earn acceptable margins over the cost of providing benefits and the expenses of acquiring and administering the products . competitive conditions , mortality experience , persistency , benefit utilization , investment results and our ability to maintain expenses in accordance with pricing assumptions drive our margins on the life products . on many products , we have the ability to mitigate adverse experience through adjustments to credited interest rates , policyholder dividends or cost of insurance charges . our ability to manage our investment portfolio to maximize investment returns while providing adequate liquidity for obligations to policyholders and minimizing the risk of defaults or impairments of invested assets . our ability to manage the level of our operating expenses . actual experience and changes in assumptions for expected surrender and withdrawal rates , mortality and spreads used in the amortization of deferred acquisition costs . our profitability is also impacted by changes in accounting guidance that impact the timing of profit recognition . see note 1 to our consolidated financial statements included in item 8 for details on adopted and pending accounting pronouncements . in addition to guidance that has been adopted , the accounting standards setting bodies are currently working on other projects that could impact the timing of profit emergence including the accounting for insurance contracts . it is uncertain what the outcome of these or other projects will be or when they will be completed . impact of recent business environment our business generally benefits from moderate to strong economic expansion . conversely , a lackluster economy characterized by higher unemployment , lower family income , lower consumer spending , muted corporate earnings growth and lower business investment could adversely impact the demand for our products in the future . we also may experience a higher incidence of claims , lapses or surrenders of policies during such times . we can not predict whether or when such actions may occur , or what impact , if any , such actions could have on our business , results of operations , cash flows or financial condition . economic and other environmental factors that may impact our business include , but are not limited to , the following : gross domestic product increased at an annual rate of 2.6 % during 2017 based on recent estimates . u.s. unemployment was estimated to be 4.1 % at year-end 2017. u.s. net farm income is estimated to have increased 2.7 % and farm real estate value is estimated to have increased 3.3 % during 2017 according to recent u.s. department of agriculture estimates . the u.s. 10-year treasury yield decreased during 2017 from 2.45 % at december 31 , 2016 to 2.40 % at december 31 , 2017. continued uncertainty as to actions the united states congress will take to address the national debt the pending department of labor fiduciary rule that expands the regulation of sales of insurance products used in retirement plans . see part 1 , item 1a for further discussion of this proposal . the enactment of the tax act during december 2017 may alter consumer demand for our insurance products . the low market interest rate environment continues to impact our investment yields as well as the interest we credit on our interest sensitive products . the benchmark 10-year u.s. treasury yield fluctuated during 2017 , reaching a high of 2.62 % in march and ultimately ending 2017 at 2.40 % , five basis points lower than year-end 2016. credit spreads continued to tighten during 2017. low crediting rates pose challenges to maintaining attractive annuity and universal life products , although our rates are comparable to other insurance companies , allowing us to maintain our competitive position within the market . we experienced an increase in the fair value of our fixed maturity security portfolio during 2017 primarily due to a decrease in market yields . see the segment discussion and “ financial condition ” section that follows for additional information regarding the impact of low market interest rates on our business . 27 results of operations for the three years ended december 31 , 2017 replace_table_token_11_th ( 1 ) amounts are net of adjustments , as applicable , to amortization of unearned revenue reserves , deferred acquisition costs and value of insurance in force acquired , as well as changes in interest sensitive product reserves and income taxes attributable to these items . ( 2 ) see note 13 to our consolidated financial statements . ( 3 ) average invested assets and annualized yield including , beginning in 2017 , investments held as securities and indebtedness of related parties ; 2016 and 2015 amounts have been adjusted for comparability . our net income increased in 2017 , compared to 2016 , primarily due to the initial impact of the tax act . net income and non-gaap operating income were positively impacted by increased earnings from an increase in the volume of business in force and the impact of unlocking , partially offset by increases in death benefits . story_separator_special_tag see note 5 to our consolidated financial statements included in item 8 for additional information regarding the tax act . 36 replace_table_token_24_th the level of realized gains ( losses ) is subject to fluctuation from period to period due to movements in credit spreads and prevailing interest rates , changes in the economic environment , the timing of the sales of the investments generating the realized gains and losses , as well as the timing of other than temporary impairment charges . during 2017 , we sold securities to reduce our exposure to a retailer and to the energy sector , resulting in realized losses of $ 0.9 million . during 2016 , we sold securities to decrease our exposure to the energy sector , resulting in realized gains of $ 3.9 million and realized losses of $ 8.4 million . see `` financial condition - investments `` and note 2 to our consolidated financial statements included in item 8 for details regarding our unrealized gains and losses on available-for-sale securities at december 31 , 2017 and 2016. we monitor the financial condition and operations of the issuers of securities rated below investment grade and of the issuers of certain investment grade securities for which we have concerns regarding credit quality that could potentially be other than temporarily impaired . see additional details regarding write downs and our methodology for evaluating investments for other-than-temporary impairment in notes 1 and 2 to our consolidated financial statements included in item 8. replace_table_token_25_th fixed maturity other-than-temporary credit losses for 2017 occurred in the construction sector due to an expected reduction in future revenue and the declining liquidity of an issuer . impairment charges were also recognized on securities and indebtedness of related parties as the tax act resulted in a change in the expected future tax benefits of lihtc entities . fixed maturity other-than-temporary credit losses for 2016 occurred within the energy sector due to a decline in credit of an issuer that led to a decrease in the expected future cash flows . other than temporary credit losses also occurred within residential mortgage-backed securities due to reduced reliance on insurance credit support , resulting in a decline in the present value of expected cash flows . fixed maturity other-than-temporary credit losses for 2015 occurred in the residential mortgage-backed sector due to changes in the amount and timing of future cash flows resulting in a decline in the present value . an impairment charge was also recognized on a real estate investment due to an appraisal declining below our current carrying value . 37 financial condition investments our investment portfolio increased 5.5 % to $ 8,620.2 million at december 31 , 2017 , compared to $ 8,174.7 million at december 31 , 2016 . the portfolio increased due to positive cash flows from operating and financing activities as well as an increase of $ 187.6 million of net unrealized appreciation of fixed maturities during 2017. additional details regarding securities in an unrealized gain or loss position at december 31 , 2017 are included in the discussion that follows and in note 2 to our consolidated financial statements included in item 8. details regarding investment impairments are discussed above in the `` realized gains ( losses ) on investments `` section under `` results of operations . `` we manage the investment portfolio to optimize risk-adjusted yield within the context of prudent asset-liability management . we evaluate multiple cash flow testing scenarios as part of this process . the company 's investment policy calls for investing primarily in high-quality fixed maturities and commercial mortgage loans . replace_table_token_26_th the table above summarizes selected information for fixed maturity purchases . the effective annual yield shown is the yield calculated to the `` worst-call date . `` for non-callable bonds , the worst-call date is always the maturity date . for callable bonds , the worst-call date is the call or maturity date that produces the lowest yield . the weighted-average life is calculated using scheduled pay-downs and expected prepayments for amortizing securities . for non-amortizing securities , the weighted-average life is equal to the stated maturity date . a portion of the securities acquired during 2017 and 2016 were acquired with the proceeds from advances on our funding agreements with the fhlb . the securities acquired to support these funding agreements often carry a lower average yield than securities acquired to support our other insurance products , due to the shorter maturity and relatively low interest rate paid on those advances . in addition , certain municipal securities acquired are exempt from federal income taxes , and accordingly have a higher actual return than reflected in the yields stated above . the average yield of the securities acquired , excluding the securities supporting the funding agreements and using a tax-adjusted yield for the municipal securities , was 3.95 % in 2017 and 4.39 % in 2016 . 38 replace_table_token_27_th as of december 31 , 2017 , 96.5 % ( based on carrying value ) of the available-for-sale fixed maturities were investment grade debt securities , defined as being in the highest two national association of insurance commissioners ( naic ) designations . non-investment grade debt securities generally provide higher yields and involve greater risks than investment grade debt securities because their issuers typically are more highly leveraged and more vulnerable to adverse economic conditions than investment grade issuers . in addition , the trading market for these securities is usually more limited than for investment grade debt securities . we regularly review the percentage of our portfolio that is invested in non-investment grade debt securities ( naic designations 3 through 6 ) . as of december 31 , 2017 , no single non-investment grade holding exceeded 0.2 % of total investments . replace_table_token_28_th ( 1 ) equivalent ratings are based on those provided by nationally recognized rating agencies with some exceptions for certain residential mortgage , commercial mortgage- and asset-backed securities that are based on the

