management 2019s discussion and analysis 58 jpmorgan chase & co./2018 form 10-k net interest income and net yield excluding cib 2019s markets businesses in addition to reviewing net interest income and the net interest yield on a managed basis , management also reviews these metrics excluding cib 2019s markets businesses , as shown below ; these metrics , which exclude cib 2019s markets businesses , are non-gaap financial measures .
management reviews these metrics to assess the performance of the firm 2019s lending , investing ( including asset-liability management ) and deposit-raising activities .
the resulting metrics that exclude cib 2019s markets businesses are referred to as non-markets-related net interest income and net yield .
cib 2019s markets businesses are fixed income markets and equity markets .
management believes that disclosure of non-markets-related net interest income and net yield provides investors and analysts with other measures by which to analyze the non-markets-related business trends of the firm and provides a comparable measure to other financial institutions that are primarily focused on lending , investing and deposit-raising activities .
year ended december 31 , ( in millions , except rates ) 2018 2017 2016 net interest income 2013 managed basis ( a ) ( b ) $ 55687 $ 51410 $ 47292 less : cib markets net interest income ( c ) 3087 4630 6334 net interest income excluding cib markets ( a ) $ 52600 $ 46780 $ 40958 average interest-earning assets $ 2229188 $ 2180592 $ 2101604 less : average cib markets interest-earning assets ( c ) 609635 540835 520307 average interest-earning assets excluding cib markets $ 1619553 $ 1639757 $ 1581297 net interest yield on average interest-earning assets 2013 managed basis 2.50% ( 2.50 % ) 2.36% ( 2.36 % ) 2.25% ( 2.25 % ) net interest yield on average cib markets interest-earning assets ( c ) 0.51 0.86 1.22 net interest yield on average interest-earning assets excluding cib markets 3.25% ( 3.25 % ) 2.85% ( 2.85 % ) 2.59% ( 2.59 % ) ( a ) interest includes the effect of related hedges .
taxable-equivalent amounts are used where applicable .
( b ) for a reconciliation of net interest income on a reported and managed basis , refer to reconciliation from the firm 2019s reported u.s .
gaap results to managed basis on page 57 .
( c ) for further information on cib 2019s markets businesses , refer to page 69 .
calculation of certain u.s .
gaap and non-gaap financial measures certain u.s .
gaap and non-gaap financial measures are calculated as follows : book value per share ( 201cbvps 201d ) common stockholders 2019 equity at period-end / common shares at period-end overhead ratio total noninterest expense / total net revenue return on assets ( 201croa 201d ) reported net income / total average assets return on common equity ( 201croe 201d ) net income* / average common stockholders 2019 equity return on tangible common equity ( 201crotce 201d ) net income* / average tangible common equity tangible book value per share ( 201ctbvps 201d ) tangible common equity at period-end / common shares at period-end * represents net income applicable to common equity the firm also reviews adjusted expense , which is noninterest expense excluding firmwide legal expense and is therefore a non-gaap financial measure .
additionally , certain credit metrics and ratios disclosed by the firm exclude pci loans , and are therefore non-gaap measures .
management believes these measures help investors understand the effect of these items on reported results and provide an alternate presentation of the firm 2019s performance .
for additional information on credit metrics and ratios excluding pci loans , refer to credit and investment risk management on pages 102-123. .

Year ended December 31,(in millions, except rates)
2018
2017
2016
Net interest income – managed basis<sup>(a)(b)</sup>
$55,687
$51,410
$47,292
Less: CIB Markets net interest income<sup>(c)</sup>
3,087
4,630
6,334
Net interest income excluding CIB Markets<sup>(a)</sup>
$52,600
$46,780
$40,958
Average interest-earning assets
$2,229,188
$2,180,592
$2,101,604
Less: Average CIB Markets interest-earning assets<sup>(c)</sup>
609,635
540,835
520,307
Average interest-earning assets excluding CIB Markets
$1,619,553
$1,639,757
$1,581,297
Net interest yield on average interest-earning assets – managed basis
2.50%
2.36%
2.25%
Net interest yield on average CIB Markets interest-earning assets<sup>(c)</sup>
0.51
0.86
1.22
Net interest yield on average interest-earning assets excluding CIB Markets
3.25%
2.85%
2.59%

management 2019s discussion and analysis 58 jpmorgan chase & co./2018 form 10-k net interest income and net yield excluding cib 2019s markets businesses in addition to reviewing net interest income and the net interest yield on a managed basis , management also reviews these metrics excluding cib 2019s markets businesses , as shown below ; these metrics , which exclude cib 2019s markets businesses , are non-gaap financial measures .
management reviews these metrics to assess the performance of the firm 2019s lending , investing ( including asset-liability management ) and deposit-raising activities .
the resulting metrics that exclude cib 2019s markets businesses are referred to as non-markets-related net interest income and net yield .
cib 2019s markets businesses are fixed income markets and equity markets .
management believes that disclosure of non-markets-related net interest income and net yield provides investors and analysts with other measures by which to analyze the non-markets-related business trends of the firm and provides a comparable measure to other financial institutions that are primarily focused on lending , investing and deposit-raising activities .
year ended december 31 , ( in millions , except rates ) 2018 2017 2016 net interest income 2013 managed basis ( a ) ( b ) $ 55687 $ 51410 $ 47292 less : cib markets net interest income ( c ) 3087 4630 6334 net interest income excluding cib markets ( a ) $ 52600 $ 46780 $ 40958 average interest-earning assets $ 2229188 $ 2180592 $ 2101604 less : average cib markets interest-earning assets ( c ) 609635 540835 520307 average interest-earning assets excluding cib markets $ 1619553 $ 1639757 $ 1581297 net interest yield on average interest-earning assets 2013 managed basis 2.50% ( 2.50 % ) 2.36% ( 2.36 % ) 2.25% ( 2.25 % ) net interest yield on average cib markets interest-earning assets ( c ) 0.51 0.86 1.22 net interest yield on average interest-earning assets excluding cib markets 3.25% ( 3.25 % ) 2.85% ( 2.85 % ) 2.59% ( 2.59 % ) ( a ) interest includes the effect of related hedges .
taxable-equivalent amounts are used where applicable .
( b ) for a reconciliation of net interest income on a reported and managed basis , refer to reconciliation from the firm 2019s reported u.s .
gaap results to managed basis on page 57 .
( c ) for further information on cib 2019s markets businesses , refer to page 69 .
calculation of certain u.s .
gaap and non-gaap financial measures certain u.s .
gaap and non-gaap financial measures are calculated as follows : book value per share ( 201cbvps 201d ) common stockholders 2019 equity at period-end / common shares at period-end overhead ratio total noninterest expense / total net revenue return on assets ( 201croa 201d ) reported net income / total average assets return on common equity ( 201croe 201d ) net income* / average common stockholders 2019 equity return on tangible common equity ( 201crotce 201d ) net income* / average tangible common equity tangible book value per share ( 201ctbvps 201d ) tangible common equity at period-end / common shares at period-end * represents net income applicable to common equity the firm also reviews adjusted expense , which is noninterest expense excluding firmwide legal expense and is therefore a non-gaap financial measure .
additionally , certain credit metrics and ratios disclosed by the firm exclude pci loans , and are therefore non-gaap measures .
management believes these measures help investors understand the effect of these items on reported results and provide an alternate presentation of the firm 2019s performance .
for additional information on credit metrics and ratios excluding pci loans , refer to credit and investment risk management on pages 102-123. .

Question: Analyse this data from a financial earnings document. by how many basis points did net interest yield on average interest-earning assets 2013 managed basis improve form 2017 to 2018?
Choices:
486
177
247.5
14.0
23
Correct choice index: 3