management 2019s discussion and analysis 78 jpmorgan chase & co./2018 form 10-k treasury and cio overview treasury and cio is predominantly responsible for measuring , monitoring , reporting and managing the firm 2019s liquidity , funding , capital , structural interest rate and foreign exchange risks .the risks managed by treasury and cio arise from the activities undertaken by the firm 2019s four major reportable business segments to serve their respective client bases , which generate both on- and off- balance sheet assets and liabilities .treasury and cio seek to achieve the firm 2019s asset-liability management objectives generally by investing in high- quality securities that are managed for the longer-term as part of the firm 2019s investment securities portfolio .treasury and cio also use derivatives to meet the firm 2019s asset- liability management objectives .for further information on derivatives , refer to note 5 .in addition , treasury and cio manage the firm 2019s cash position primarily through depositing at central banks and investing in short-term instruments .for further information on liquidity and funding risk , refer to liquidity risk management on pages 95 2013100 .for information on interest rate , foreign exchange and other risks , refer to market risk management on pages 124 2013131 .the investment securities portfolio primarily consists of agency and nonagency mortgage-backed securities , u.s .and non-u.s .government securities , obligations of u.s .states and municipalities , other abs and corporate debt securities .at december 31 , 2018 , the investment securities portfolio was $ 260.1 billion , and the average credit rating of the securities comprising the portfolio was aa+ ( based upon external ratings where available and , where not available , based primarily upon internal ratings that correspond to ratings as defined by s&p and moody 2019s ) .refer to note 10 for further information on the firm 2019s investment securities portfolio .selected income statement and balance sheet data as of or for the year ended december 31 , ( in millions ) 2018 2017 2016 investment securities gains/ ( losses ) $ ( 395 ) $ ( 78 ) $ 132 available-for-sale ( 201cafs 201d ) investment securities ( average ) 203449 219345 226892 held-to-maturity ( 201chtm 201d ) investment securities ( average ) 31747 47927 51358 investment securities portfolio ( average ) 235197 267272 278250 afs investment securities ( period-end ) 228681 200247 236670 htm investment securities ( period-end ) 31434 47733 50168 investment securities portfolio ( period 2013end ) 260115 247980 286838 as permitted by the new hedge accounting guidance , the firm elected to transfer certain investment securities from htm to afs in the first quarter of 2018 .for additional information , refer to notes 1 and 10. .
[['as of or for the year ended december 31 ( in millions )', '2018', '2017', '2016'], ['investment securities gains/ ( losses )', '$ -395 ( 395 )', '$ -78 ( 78 )', '$ 132'], ['available-for-sale ( 201cafs 201d ) investment securities ( average )', '203449', '219345', '226892'], ['held-to-maturity ( 201chtm 201d ) investment securities ( average )', '31747', '47927', '51358'], ['investment securities portfolio ( average )', '235197', '267272', '278250'], ['afs investment securities ( period-end )', '228681', '200247', '236670'], ['htm investment securities ( period-end )', '31434', '47733', '50168'], ['investment securities portfolio ( period 2013end )', '260115', '247980', '286838']]
management 2019s discussion and analysis 78 jpmorgan chase & co./2018 form 10-k treasury and cio overview treasury and cio is predominantly responsible for measuring , monitoring , reporting and managing the firm 2019s liquidity , funding , capital , structural interest rate and foreign exchange risks .the risks managed by treasury and cio arise from the activities undertaken by the firm 2019s four major reportable business segments to serve their respective client bases , which generate both on- and off- balance sheet assets and liabilities .treasury and cio seek to achieve the firm 2019s asset-liability management objectives generally by investing in high- quality securities that are managed for the longer-term as part of the firm 2019s investment securities portfolio .treasury and cio also use derivatives to meet the firm 2019s asset- liability management objectives .for further information on derivatives , refer to note 5 .in addition , treasury and cio manage the firm 2019s cash position primarily through depositing at central banks and investing in short-term instruments .for further information on liquidity and funding risk , refer to liquidity risk management on pages 95 2013100 .for information on interest rate , foreign exchange and other risks , refer to market risk management on pages 124 2013131 .the investment securities portfolio primarily consists of agency and nonagency mortgage-backed securities , u.s .and non-u.s .government securities , obligations of u.s .states and municipalities , other abs and corporate debt securities .at december 31 , 2018 , the investment securities portfolio was $ 260.1 billion , and the average credit rating of the securities comprising the portfolio was aa+ ( based upon external ratings where available and , where not available , based primarily upon internal ratings that correspond to ratings as defined by s&p and moody 2019s ) .refer to note 10 for further information on the firm 2019s investment securities portfolio .selected income statement and balance sheet data as of or for the year ended december 31 , ( in millions ) 2018 2017 2016 investment securities gains/ ( losses ) $ ( 395 ) $ ( 78 ) $ 132 available-for-sale ( 201cafs 201d ) investment securities ( average ) 203449 219345 226892 held-to-maturity ( 201chtm 201d ) investment securities ( average ) 31747 47927 51358 investment securities portfolio ( average ) 235197 267272 278250 afs investment securities ( period-end ) 228681 200247 236670 htm investment securities ( period-end ) 31434 47733 50168 investment securities portfolio ( period 2013end ) 260115 247980 286838 as permitted by the new hedge accounting guidance , the firm elected to transfer certain investment securities from htm to afs in the first quarter of 2018 .for additional information , refer to notes 1 and 10. .

Question: what is the estimated percentual decrease observed in the htm investment securities from 2017 to 2018 ? .
Answer: 34.1%
Explanation: its the percentage of the decrease ( the value's variation between 2018 and 2017 ) .