management 2019s discussion and analysis 74 jpmorgan chase & co./2017 annual report treasury and cio overview treasury and cio is predominantly responsible for measuring , monitoring , reporting and managing the firm 2019s liquidity , funding and structural interest rate and foreign exchange risks , as well as executing the firm 2019s capital plan . 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 , see note 5 . 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 , 2017 , the investment securities portfolio was $ 248.0 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 ) . see note 10 for further information on the details of the firm 2019s investment securities portfolio . for further information on liquidity and funding risk , see liquidity risk management on pages 92 201397 . for information on interest rate , foreign exchange and other risks , see market risk management on pages 121-128 . selected income statement and balance sheet data as of or for the year ended december 31 , ( in millions ) 2017 2016 2015 .

2017: securities gains/ ( losses ): -78
afs investment securities ( average ): 219345
htm investment securities ( average ): 47927
investment securities portfolio ( average ): 267272
afs investment securities ( period-end ): 200247
htm investment securities ( period-end ): 47733
investment securities portfolio ( period 2013end ): 247980
2016: securities gains/ ( losses ): 132
afs investment securities ( average ): 226892
htm investment securities ( average ): 51358
investment securities portfolio ( average ): 278250
afs investment securities ( period-end ): 236670
htm investment securities ( period-end ): 50168
investment securities portfolio ( period 2013end ): 286838
2015: securities gains/ ( losses ): 190
afs investment securities ( average ): 264758
htm investment securities ( average ): 50044
investment securities portfolio ( average ): 314802
afs investment securities ( period-end ): 238704
htm investment securities ( period-end ): 49073
investment securities portfolio ( period 2013end ): 287777

afs investment securities ( average ) 219345 226892 264758 htm investment securities ( average ) 47927 51358 50044 investment securities portfolio ( average ) 267272 278250 314802 afs investment securities ( period-end ) 200247 236670 238704 htm investment securities ( period-end ) 47733 50168 49073 investment securities portfolio ( period 2013end ) 247980 286838 287777 .

Questions:
what is the ratio of afs investment securities period-end to average in 2017?

Answers:
0.913