jpmorgan chase & co./2017 annual report 115 impact of wrong-way risk , which is broadly defined as the potential for increased correlation between the firm 2019s exposure to a counterparty ( avg ) and the counterparty 2019s credit quality . many factors may influence the nature and magnitude of these correlations over time . to the extent that these correlations are identified , the firm may adjust the cva associated with that counterparty 2019s avg . the firm risk manages exposure to changes in cva by entering into credit derivative transactions , as well as interest rate , foreign exchange , equity and commodity derivative transactions . the accompanying graph shows exposure profiles to the firm 2019s current derivatives portfolio over the next 10 years as calculated by the peak , dre and avg metrics . the three measures generally show that exposure will decline after the first year , if no new trades are added to the portfolio . exposure profile of derivatives measures december 31 , 2017 ( in billions ) the following table summarizes the ratings profile by derivative counterparty of the firm 2019s derivative receivables , including credit derivatives , net of all collateral , at the dates indicated . the ratings scale is based on the firm 2019s internal ratings , which generally correspond to the ratings as assigned by s&p and moody 2019s . ratings profile of derivative receivables .

Table:
rating equivalent december 31 ( in millions except ratios ) | rating equivalent exposure net of all collateral | rating equivalent % (  % ) of exposure netof all collateral | exposure net of all collateral | % (  % ) of exposure netof all collateral
aaa/aaa to aa-/aa3 | $ 11529 | 29% ( 29 % ) | $ 11449 | 28% ( 28 % )
a+/a1 to a-/a3 | 6919 | 17 | 8505 | 20
bbb+/baa1 to bbb-/baa3 | 13925 | 34 | 13127 | 32
bb+/ba1 to b-/b3 | 7397 | 18 | 7308 | 18
ccc+/caa1 and below | 645 | 2 | 984 | 2
total | $ 40415 | 100% ( 100 % ) | $ 41373 | 100% ( 100 % )
as previously noted , the firm uses collateral agreements to mitigate counterparty credit risk .
the percentage of the firm 2019s over-the-counter derivatives transactions subject to collateral agreements 2014 excluding foreign exchange spot trades , which are not typically covered by collateral agreements due to their short maturity and centrally cleared trades that are settled daily 2014 was approximately 90% ( 90 % ) as of december 31 , 2017 , largely unchanged compared with december 31 , 2016 .
credit derivatives the firm uses credit derivatives for two primary purposes : first , in its capacity as a market-maker , and second , as an end-user to manage the firm 2019s own credit risk associated with various exposures .
for a detailed description of credit derivatives , see credit derivatives in note 5 .
credit portfolio management activities included in the firm 2019s end-user activities are credit derivatives used to mitigate the credit risk associated with traditional lending activities ( loans and unfunded commitments ) and derivatives counterparty exposure in the firm 2019s wholesale businesses ( collectively , 201ccredit portfolio management 201d activities ) .
information on credit portfolio management activities is provided in the table below .
for further information on derivatives used in credit portfolio management activities , see credit derivatives in note 5 .
the firm also uses credit derivatives as an end-user to manage other exposures , including credit risk arising from certain securities held in the firm 2019s market-making businesses .
these credit derivatives are not included in credit portfolio management activities ; for further information on these credit derivatives as well as credit derivatives used in the firm 2019s capacity as a market-maker in credit derivatives , see credit derivatives in note 5 .
10 years5 years2 years1 year .

Question: for 2017 , what percentage of derivative receivables are rated junk?
Answer: 20
Calculation: add(18, 2)