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)
$(78)
$132
Available-for-sale (“AFS”) investment securities (average)
203,449
219,345
226,892
Held-to-maturity (“HTM”) investment securities (average)
31,747
47,927
51,358
Investment securities portfolio (average)
235,197
267,272
278,250
AFS investment securities (period-end)
228,681
200,247
236,670
HTM investment securities (period-end)
31,434
47,733
50,168
Investment securities portfolio (period–end)
260,115
247,980
286,838

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: Analyse this data from a financial earnings document. what is the estimated percentual decrease observed in the htm investment securities from 2017 to 2018 ? .
Choices:
31434
-0.65255
-3.79084
0.34146
1
Correct choice index: 3