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Credit substitutes | 12 Months Ended
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Mar. 31, 2018
Credit substitutes | 8. Credit substitutes Credit substitutes consist of securities that the Bank invests in as part of an overall extension of credit to certain customers. Such securities share many of the risk and reward characteristics of loans and are managed by the Bank together with other credit facilities extended to the same customers. The fair values of credit substitutes by type of instrument as of March 31, 2017 and March 31, 2018 were as follows:
|  | As of March 31, |
|  | 2017 |  |  | 2018 |
|  | Amortized Cost |  |  | Fair Value |  |  | Amortized Cost |  |  | Fair Value |
|  | (In millions) |
Available for sale credit substitute securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debentures |  | Rs. | 171,180.6 |  |  | Rs. | 171,270.9 |  |  | Rs. | 290,893.5 |  |  | Rs. | 289,782.9 |
Commercial paper |  |  | 248,139.9 |  |  |  | 248,269.7 |  |  |  | 34,265.8 |  |  |  | 34,248.6 |
Total |  | Rs. | 419,320.5 |  |  | Rs. | 419,540.6 |  |  | Rs. | 325,159.3 |  |  | Rs. | 324,031.5 |
|  |  |  |  |  |  |  |  |  | US$ | 4,994.0 |  |  | US$ | 4,976.7 |
The fair values of credit substitutes by the Bank’s internal credit quality indicators and amounts provided for other than temporary impairments is as follows:
|  | As of March 31, |
|  | 2017 |  |  | 2018 |  |  | 2018 |
|  | (In millions) |
Pass |  | Rs. | 419,540.6 |  |  | Rs. | 324,031.5 |  |  | US$ | 4,976.7 |
Impaired—gross balance |  |  | — |  |  |  | — |  |  |  | — |
Less: amounts provided for other than temporary impairments |  |  | — |  |  |  | — |  |  |  | — |
Impaired credit substitutes, net |  |  | — |  |  |  | — |  |  |  | — |
Total credit substitutes, net |  | Rs. | 419,540.6 |  |  | Rs. | 324,031.5 |  |  | US$ | 4,976.7 |
Impaired credit substitutes
|  | As of March 31, |
|  | 2017 |  |  | 2018 |  |  | 2018 |
|  | (In millions) |
Gross impaired credit substitutes |  |  | Rs.— |  |  |  | Rs.— |  |  | US$ | — |
Gross impaired credit substitutes by industry |  |  | Rs.— |  |  |  | Rs.— |  |  | US$ | — |
Average impaired credit substitutes |  |  | Rs.— |  |  |  | Rs.— |  |  | US$ | — |
Interest income recognized on impaired credit substitutes |  |  | Rs.— |  |  |  | Rs.— |  |  | US$ | — |
As of March 31, 2018, the Bank has no additional funds committed to borrowers whose credit substitutes were impaired.

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- Definition Credit substitutes consists of securities that the Bank invests in as part of an overall extension of credit to certain customers. Such securities share many of the risk and reward characteristics of loans and are managed by the Bank together with other credit facilities extended to the same customers. + References No definition available. + Details
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Namespace Prefix: | hdb_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration