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Investments (Tables) | 12 Months Ended
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Mar. 31, 2017
Credit Substitutes |
Available for Sale Securities Amortized Cost and Fair Value | The fair values of credit substitutes by type of instrument as of March 31, 2016 and March 31, 2017 were as follows:
|  | As of March 31, |
|  | 2016 |  |  | 2017 |
|  | Amortized Cost |  |  | Fair Value |  |  | Amortized Cost |  |  | Fair Value |
|  | (In millions) |
Available for sale credit substitute securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debentures |  | Rs. | 39,028.0 |  |  | Rs. | 39,234.6 |  |  | Rs. | 171,180.6 |  |  | Rs. | 171,270.9 |
Commercial paper |  |  | 258,126.7 |  |  |  | 258,006.4 |  |  |  | 248,139.9 |  |  |  | 248,269.7 |
Total |  | Rs. | 297,154.7 |  |  | Rs. | 297,241.0 |  |  | Rs. | 419,320.5 |  |  | Rs. | 419,540.6 |
|  |  |  |  |  |  |  |  |  | US$ | 6,466.0 |  |  | US$ | 6,469.4 |
Held for Trading |
Portfolio of Trading Securities or Held for Trading Securities Amortized Cost Fair Value | The portfolio of trading securities as of March 31, 2016 and March 31, 2017 was as follows:
|  | As of March 31, 2016 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
|  | (In millions) |
Government of India securities |  | Rs. | 56,954.3 |  |  | Rs. | 41.9 |  |  | Rs. | — |  |  | Rs. | 56,996.2 |
Other corporate/financial institution securities |  |  | 14,749.1 |  |  |  | 115.6 |  |  |  | — |  |  |  | 14,864.7 |
Total |  | Rs. | 71,703.4 |  |  | Rs. | 157.5 |  |  | Rs. | — |  |  | Rs. | 71,860.9 |
|  | As of March 31, 2017 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
|  | (In millions) |
Government of India securities |  | Rs. | 18,230.8 |  |  | Rs. | 38.5 |  |  | Rs. | 1.5 |  |  | Rs. | 18,267.8 |
Other corporate/financial institution securities |  |  | 17,106.4 |  |  |  | 5.1 |  |  |  | 15.6 |  |  |  | 17,095.9 |
Total |  | Rs. | 35,337.2 |  |  | Rs. | 43.6 |  |  | Rs. | 17.1 |  |  | Rs. | 35,363.7 |
Total |  | US$ | 544.9 |  |  | US$ | 0.7 |  |  | US$ | 0.3 |  |  | US$ | 545.3 |
Available-for-Sale Securities |
Available for Sale Securities Amortized Cost and Fair Value | The portfolio of available for sale securities as of March 31, 2016 and March 31, 2017 was as follows:
|  | As of March 31, 2016 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
|  | (In millions) |
Government of India securities |  | Rs. | 1,443,404.6 |  |  | Rs. | 12,828.9 |  |  | Rs. | 168.0 |  |  | Rs. | 1,456,065.5 |
State government securities |  |  | 92,613.3 |  |  |  | 3,149.3 |  |  |  | — |  |  |  | 95,762.6 |
Credit substitutes (see note 8) |  |  | 297,154.7 |  |  |  | 318.2 |  |  |  | 231.9 |  |  |  | 297,241.0 |
Other corporate/financial institution bonds |  |  | 8,541.9 |  |  |  | 17.6 |  |  |  | 3.5 |  |  |  | 8,556.0 |
Debt securities, other than asset and mortgage-backed securities |  |  | 1,841,714.5 |  |  |  | 16,314.0 |  |  |  | 403.4 |  |  |  | 1,857,625.1 |
Mortgage-backed securities |  |  | 651.4 |  |  |  | 17.6 |  |  |  | 1.3 |  |  |  | 667.7 |
Asset-backed securities |  |  | 19,417.4 |  |  |  | 191.9 |  |  |  | 429.5 |  |  |  | 19,179.8 |
Other securities (including mutual fund units) |  |  | 767.6 |  |  |  | 444.2 |  |  |  | — |  |  |  | 1,211.8 |
Total |  | Rs. | 1,862,550.9 |  |  | Rs. | 16,967.7 |  |  | Rs. | 834.2 |  |  | Rs. | 1,878,684.4 |
Securities with gross unrealized losses |  |  |  |  |  |  |  |  |  |  |  |  |  | Rs. | 304,916.5 |
Securities with gross unrealized gains |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,573,767.9 |
|  |  |  |  |  |  |  |  |  |  |  |  |  | Rs. | 1,878,684.4 |
|  | As of March 31, 2017 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
|  | (In millions) |
Government of India securities |  | Rs. | 1,528,484.8 |  |  | Rs. | 35,196.3 |  |  | Rs. | 2,811.3 |  |  | Rs. | 1,560,869.8 |
State government securities |  |  | 90,652.8 |  |  |  | 5,537.0 |  |  |  | — |  |  |  | 96,189.8 |
Credit substitutes (see note 8) |  |  | 419,320.5 |  |  |  | 957.9 |  |  |  | 737.8 |  |  |  | 419,540.6 |
Other corporate/financial institution bonds |  |  | 10,653.0 |  |  |  | 83.5 |  |  |  | 12.1 |  |  |  | 10,724.4 |
Debt securities, other than asset and mortgage-backed securities |  |  | 2,049,111.1 |  |  |  | 41,774.7 |  |  |  | 3,561.2 |  |  |  | 2,087,324.6 |
Mortgage-backed securities |  |  | 114.1 |  |  |  | 5.9 |  |  |  | — |  |  |  | 120.0 |
Asset-backed securities |  |  | 22,472.2 |  |  |  | 214.1 |  |  |  | 353.3 |  |  |  | 22,333.0 |
Other securities (including mutual fund units) |  |  | 1,062.0 |  |  |  | 641.5 |  |  |  | 95.5 |  |  |  | 1,608.0 |
Total |  | Rs. | 2,072,759.4 |  |  | Rs. | 42,636.2 |  |  | Rs. | 4,010.0 |  |  | Rs. | 2,111,385.6 |
Total |  | US$ | 31,962.3 |  |  | US$ | 657.5 |  |  | US$ | 61.8 |  |  | US$ | 32,558.0 |
Securities with gross unrealized losses |  |  |  |  |  |  |  |  |  |  |  |  |  | Rs. | 431,324.6 |
Securities with gross unrealized gains |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,680,061.0 |
|  |  |  |  |  |  |  |  |  |  |  |  |  | Rs. | 2,111,385.6 |
|  |  |  |  |  |  |  |  |  |  |  |  |  | US$ | 32,558.0 |
Unrealized loss position investments | The gross unrealized losses and fair value of available for sale securities at March 31, 2016 was as follows:
|  | As of March 31, 2016 |  |  |  |  |  |  |
|  | Less Than 12 Months |  |  | 12 Months or Greater |  |  | Total |
|  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |
|  |  |  |  |  |  |  | (In millions) |  |  |  |  |  |  |
Government of India securities |  | Rs. | 40,363.1 |  |  | Rs. | 16.1 |  |  | Rs. | 27,683.1 |  |  | Rs. | 151.9 |  |  | Rs. | 68,046.2 |  |  | Rs. | 168.0 |
Credit substitutes (see note 8) |  |  | 213,878.3 |  |  |  | 231.4 |  |  |  | 749.6 |  |  |  | 0.5 |  |  |  | 214,627.9 |  |  |  | 231.9 |
Other corporate/financial institution bonds |  |  | 1,393.4 |  |  |  | 2.6 |  |  |  | 2,287.9 |  |  |  | 0.9 |  |  |  | 3,681.3 |  |  |  | 3.5 |
Debt securities, other than asset and mortgage-backed securities |  |  | 255,634.8 |  |  |  | 250.1 |  |  |  | 30,720.6 |  |  |  | 153.3 |  |  |  | 286,355.4 |  |  |  | 403.4 |
Mortgage-backed securities |  |  | 87.6 |  |  |  | 1.3 |  |  |  | — |  |  |  | — |  |  |  | 87.6 |  |  |  | 1.3 |
Asset-backed securities |  |  | 18,473.5 |  |  |  | 429.5 |  |  |  | — |  |  |  | — |  |  |  | 18,473.5 |  |  |  | 429.5 |
Total |  | Rs. | 274,195.9 |  |  | Rs. | 680.9 |  |  | Rs. | 30,720.6 |  |  | Rs. | 153.3 |  |  | Rs. | 304,916.5 |  |  | Rs. | 834.2 |
The gross unrealized losses and fair value of available for sale securities at March 31, 2017 was as follows:
|  | As of March 31, 2017 |  |  |  |  |  |  |
|  | Less Than 12 Months |  |  | 12 Months or Greater |  |  | Total |
|  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |
|  |  |  |  |  |  |  | (In millions) |  |  |  |  |  |  |
Government of India securities |  | Rs. | 234,685.5 |  |  | Rs. | 2,811.3 |  |  | Rs. | — |  |  | Rs. | — |  |  | Rs. | 234,685.5 |  |  | Rs. | 2,811.3 |
Credit substitutes (see note 8) |  |  | 178,908.2 |  |  |  | 737.8 |  |  |  | — |  |  |  | — |  |  |  | 178,908.2 |  |  |  | 737.8 |
Other corporate/financial institution bonds |  |  | 3,521.0 |  |  |  | 12.1 |  |  |  | — |  |  |  | — |  |  |  | 3,521.0 |  |  |  | 12.1 |
Debt securities, other than asset and mortgage-backed securities |  |  | 417,114.7 |  |  |  | 3,561.2 |  |  |  | — |  |  |  | — |  |  |  | 417,114.7 |  |  |  | 3,561.2 |
Mortgage-backed securities |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Asset-backed securities |  |  | 9,149.5 |  |  |  | 257.9 |  |  |  | 4,929.6 |  |  |  | 95.4 |  |  |  | 14,079.1 |  |  |  | 353.3 |
Other securities (including mutual fund units) |  |  | 130.8 |  |  |  | 95.5 |  |  |  | — |  |  |  | — |  |  |  | 130.8 |  |  |  | 95.5 |
Total |  | Rs. | 426,395.0 |  |  | Rs. | 3,914.6 |  |  | Rs. | 4,929.6 |  |  | Rs. | 95.4 |  |  | Rs. | 431,324.6 |  |  | Rs. | 4,010.0 |
Total |  | US$ | 6,575.1 |  |  | US$ | 60.3 |  |  | US$ | 76.0 |  |  | US$ | 1.5 |  |  | US$ | 6,651.1 |  |  | US$ | 61.8 |
Realized Investment Gains Losses Net | Gross realized gains and gross realized losses from sale of available for sale securities and dividends and interest on such securities are set out below:
|  | Fiscal year ended March 31, |
|  | 2015 |  |  | 2016 |  |  | 2017 |  |  | 2017 |
|  | (In millions) |
Gross realized gains on sale |  | Rs. | 5,484.3 |  |  | Rs. | 5,942.0 |  |  | Rs. | 10,108.2 |  |  | US$ | 155.9 |
Gross realized losses on sale |  |  | (316.4 | ) |  |  | (296.0 | ) |  |  | (502.0 | ) |  |  | (7.8 | )
Realized gains (losses), net |  |  | 5,167.9 |  |  |  | 5,646.0 |  |  |  | 9,606.2 |  |  |  | 148.1 |
Dividends and interest |  |  | 94,129.1 |  |  |  | 136,062.4 |  |  |  | 154,618.6 |  |  |  | 2,384.2 |
Total |  | Rs. | 99,297.0 |  |  | Rs. | 141,708.4 |  |  | Rs. | 164,224.8 |  |  | US$ | 2,532.3 |
Available-for-Sale Securities | Debt securities, other than asset and mortgage-backed securities |
Investments Classified by Contractual Maturity Date | The contractual residual maturity of available for sale debt securities other than asset and mortgage-backed securities as of March 31, 2017 is set out below:
|  | As of March 31, 2017 |
|  | Amortized Cost |  |  | Fair Value |  |  | Fair Value |
|  | (In millions) |
Within one year |  | Rs. | 620,229.0 |  |  | Rs. | 620,957.6 |  |  | US$ | 9,575.3 |
Over one year through five years |  |  | 416,960.1 |  |  |  | 425,919.8 |  |  |  | 6,567.8 |
Over five years through ten years |  |  | 669,331.6 |  |  |  | 687,794.1 |  |  |  | 10,605.9 |
Over ten years |  |  | 342,590.4 |  |  |  | 352,653.1 |  |  |  | 5,438.0 |
Total |  | Rs. | 2,049,111.1 |  |  | Rs. | 2,087,324.6 |  |  | US$ | 32,187.0 |
Available-for-Sale Securities | Asset and Mortgage Backed Securities |
Investments Classified by Contractual Maturity Date | The contractual residual maturity of available for sale mortgage-backed and asset-backed securities as of March 31, 2017 is set out below:
|  | As of March 31, 2017 |
|  | Amortized Cost |  |  | Fair Value |  |  | Fair Value |
|  | (In millions) |
Within one year |  | Rs. | 11,440.5 |  |  | Rs. | 11,320.1 |  |  | US$ | 174.6 |
Over one year through five years |  |  | 10,822.8 |  |  |  | 10,672.4 |  |  |  | 164.6 |
Over five years through ten years |  |  | 52.2 |  |  |  | 52.0 |  |  |  | 0.8 |
Over ten years |  |  | 270.8 |  |  |  | 408.5 |  |  |  | 6.3 |
Total |  | Rs. | 22,586.3 |  |  | Rs. | 22,453.0 |  |  | US$ | 346.3 |

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