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Investments | 12 Months Ended
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Mar. 31, 2018
Held for Trading |
Investments | 5. Investments, held for trading The portfolio of trading securities as of March 31, 2017 and March 31, 2018 was as follows:
|  | 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 |
|  | As of March 31, 2018 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
|  | (In millions) |
Government of India securities |  | Rs. | 25,962.2 |  |  | Rs. | 19.0 |  |  | Rs. | 8.0 |  |  | Rs. | 25,973.2 |
Other corporate/financial institution securities |  |  | 49,982.3 |  |  |  | 62.8 |  |  |  | 0.4 |  |  |  | 50,044.7 |
Total debt securities |  | Rs. | 75,944.5 |  |  | Rs. | 81.8 |  |  | Rs. | 8.4 |  |  | Rs. | 76,017.9 |
Other securities (including mutual fund units) |  |  | 91,488.6 |  |  |  | 7.4 |  |  |  | — |  |  |  | 91,496.0 |
Total |  | Rs. | 167,433.1 |  |  | Rs. | 89.2 |  |  | Rs. | 8.4 |  |  | Rs. | 167,513.9 |
Total |  | US$ | 2,571.5 |  |  | US$ | 1.4 |  |  | US$ | 0.1 |  |  | US$ | 2,572.8 |
Available-for-Sale Securities |
Investments | 6. Investments, available for sale The portfolio of available for sale securities as of March 31, 2017 and March 31, 2018 was as follows:
|  | 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 |
Securities with gross unrealized losses |  |  |  |  |  |  |  |  |  |  |  |  |  | Rs. | 431,324.6 |
Securities with gross unrealized gains |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,680,061.0 |
|  |  |  |  |  |  |  |  |  |  |  |  |  | Rs. | 2,111,385.6 |
|  | As of March 31, 2018 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
|  | (In millions) |
Government of India securities |  | Rs. | 1,748,761.0 |  |  | Rs. | 9,169.5 |  |  | Rs. | 16,843.9 |  |  | Rs. | 1,741,086.6 |
State government securities |  |  | 123,426.9 |  |  |  | 2,349.7 |  |  |  | 729.0 |  |  |  | 125,047.6 |
Government securities outside India |  |  | 4,223.8 |  |  |  | — |  |  |  | 6.8 |  |  |  | 4,217.0 |
Credit substitutes (see note 8) |  |  | 325,159.3 |  |  |  | 495.3 |  |  |  | 1,623.1 |  |  |  | 324,031.5 |
Other corporate/financial institution bonds |  |  | 8,226.0 |  |  |  | 0.1 |  |  |  | 59.0 |  |  |  | 8,167.1 |
Debt securities, other than asset and mortgage-backed securities |  |  | 2,209,797.0 |  |  |  | 12,014.6 |  |  |  | 19,261.8 |  |  |  | 2,202,549.8 |
Mortgage-backed securities |  |  | 82.2 |  |  |  | 2.8 |  |  |  | 0.1 |  |  |  | 84.9 |
Asset-backed securities |  |  | 18,966.5 |  |  |  | 62.9 |  |  |  | 358.7 |  |  |  | 18,670.7 |
Other securities (including mutual fund units) |  |  | 993.2 |  |  |  | 412.8 |  |  |  | 0.4 |  |  |  | 1,405.6 |
Total |  | Rs. | 2,229,838.9 |  |  | Rs. | 12,493.1 |  |  | Rs. | 19,621.0 |  |  | Rs. | 2,222,711.0 |
Total |  | US$ | 34,247.3 |  |  | US$ | 191.9 |  |  | US$ | 301.4 |  |  | US$ | 34,137.8 |
Securities with gross unrealized losses |  |  |  |  |  |  |  |  |  |  |  |  |  | Rs. | 1,174,762.5 |
Securities with gross unrealized gains |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,047,948.5 |
|  |  |  |  |  |  |  |  |  |  |  |  |  | Rs. | 2,222,711.0 |
|  |  |  |  |  |  |  |  |  |  |  |  |  | US$ | 34,137.8 |
AFS investments of Rs. 1,657,059.6 million and Rs. 1,866,134.2 million (US$ 28,661.3 million) as of March 31, 2017 and March 31, 2018, respectively, are eligible towards the Bank’s statutory liquidity reserve requirements. These balances are subject to withdrawal and usage restrictions towards the reserve requirements, but may be freely traded by the Bank. Of these investments, Rs. 1,200,857.2 million as of March 31, 2017 and Rs. 1,354,027.6 million (US$ 20,796.0 million) as of March 31, 2018, were kept as margins for clearing, collateral borrowing and lending obligation (CBLO), real time gross settlement (RTGS), with the Reserve Bank of India and other financial institutions. The Bank evaluated the impaired investments and has fully recognized an expense of Rs. 54.9 million, Rs. 13.4 million and Rs. 149.1 million (USD 2.3 million) as other than temporary impairment in fiscal year 2016, 2017 and 2018, respectively, because the Bank intends to sell the securities before recovery of their amortized cost. The Bank is of the opinion that the other unrealized losses on its investments in equity and debt securities as of March 31, 2018 are temporary in nature. As of March 31, 2017 and March 31, 2018, the Bank did not hold any debt securities with credit losses for which a portion of other-than-temporary impairment was recognized in other comprehensive income. 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 |
The gross unrealized losses and fair value of available for sale securities at March 31, 2018 was as follows:
|  | As of March 31, 2018 |  |  |  |  |  |  |
|  | 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. | 540,941.5 |  |  | Rs. | 8,852.9 |  |  | Rs. | 342,621.5 |  |  | Rs. | 7,991.0 |  |  | Rs. | 883,563.0 |  |  | Rs. | 16,843.9 |
State government securities |  |  | 31,940.1 |  |  |  | 729.0 |  |  |  | — |  |  |  | — |  |  |  | 31,940.1 |  |  |  | 729.0 |
Government securities outside India |  |  | 4,217.0 |  |  |  | 6.8 |  |  |  | — |  |  |  | — |  |  |  | 4,217.0 |  |  |  | 6.8 |
Credit substitutes (see note 8) |  |  | 159,026.1 |  |  |  | 1,002.8 |  |  |  | 73,734.9 |  |  |  | 620.3 |  |  |  | 232,761.0 |  |  |  | 1,623.1 |
Other corporate/financial institution bonds |  |  | 4,057.2 |  |  |  | 51.8 |  |  |  | 4,109.6 |  |  |  | 7.2 |  |  |  | 8,166.8 |  |  |  | 59.0 |
Debt securities, other than asset and mortgage-backed securities |  |  | 740,181.9 |  |  |  | 10,643.3 |  |  |  | 420,466.0 |  |  |  | 8,618.5 |  |  |  | 1,160,647.9 |  |  |  | 19,261.8 |
Mortgage-backed securities |  |  | 57.0 |  |  |  | 0.1 |  |  |  | — |  |  |  | — |  |  |  | 57.0 |  |  |  | 0.1 |
Asset-backed securities |  |  | 8,331.9 |  |  |  | 213.1 |  |  |  | 5,706.1 |  |  |  | 145.6 |  |  |  | 14,038.0 |  |  |  | 358.7 |
Other securities (including mutual fund units) |  |  | 19.6 |  |  |  | 0.4 |  |  |  | — |  |  |  | — |  |  |  | 19.6 |  |  |  | 0.4 |
Total |  | Rs. | 748,590.4 |  |  | Rs. | 10,856.9 |  |  | Rs. | 426,172.1 |  |  | Rs. | 8,764.1 |  |  | Rs. | 1,174,762.5 |  |  | Rs. | 19,621.0 |
Total |  | US$ | 11,497.3 |  |  | US$ | 166.8 |  |  | US$ | 6,545.4 |  |  | US$ | 134.6 |  |  | US$ | 18,042.7 |  |  | US$ | 301.4 |
The contractual residual maturity of available for sale debt securities other than asset and mortgage-backed securities as of March 31, 2018 is set out below:
|  | As of March 31, 2018 |
|  | Amortized Cost |  |  | Fair Value |  |  | Fair Value |
|  | (In millions) |
Within one year |  | Rs. | 557,314.1 |  |  | Rs. | 557,374.5 |  |  | US$ | 8,560.5 |
Over one year through five years |  |  | 548,402.5 |  |  |  | 552,077.4 |  |  |  | 8,479.1 |
Over five years through ten years |  |  | 762,418.9 |  |  |  | 754,268.7 |  |  |  | 11,584.5 |
Over ten years |  |  | 341,661.5 |  |  |  | 338,829.2 |  |  |  | 5,204.0 |
Total |  | Rs. | 2,209,797.0 |  |  | Rs. | 2,202,549.8 |  |  | US$ | 33,828.1 |
The contractual residual maturity of available for sale mortgage-backed and asset-backed securities as of March 31, 2018 is set out below:
|  | As of March 31, 2018 |
|  | Amortized Cost |  |  | Fair Value |  |  | Fair Value |
|  | (In millions) |
Within one year |  | Rs. | 9,939.6 |  |  | Rs. | 9,779.0 |  |  | US$ | 150.2 |
Over one year through five years |  |  | 8,987.0 |  |  |  | 8,802.4 |  |  |  | 135.2 |
Over five years through ten years |  |  | 19.3 |  |  |  | 19.3 |  |  |  | 0.3 |
Over ten years |  |  | 102.8 |  |  |  | 154.9 |  |  |  | 2.4 |
Total |  | Rs. | 19,048.7 |  |  | Rs. | 18,755.6 |  |  | US$ | 288.1 |
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, |
|  | 2016 |  |  | 2017 |  |  | 2018 |  |  | 2018 |
|  | (In millions) |
Gross realized gains on sale |  | Rs. | 5,942.0 |  |  | Rs. | 10,108.2 |  |  | Rs. | 11,433.8 |  |  | US$ | 175.6 |
Gross realized losses on sale |  |  | (296.0 | ) |  |  | (502.0 | ) |  |  | (580.6 | ) |  |  | (8.9 | )
Realized gains (losses), net |  |  | 5,646.0 |  |  |  | 9,606.2 |  |  |  | 10,853.2 |  |  |  | 166.7 |
Dividends and interest |  |  | 136,062.4 |  |  |  | 154,618.6 |  |  |  | 158,209.2 |  |  |  | 2,429.9 |
Total |  | Rs. | 141,708.4 |  |  | Rs. | 164,224.8 |  |  | Rs. | 169,062.4 |  |  | US$ | 2,596.6 |
Held-to-maturity Securities |
Investments | 7. Investments, held to maturity There were no HTM securities as of March 31, 2017 and March 31, 2018.

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- Definition The entire disclosure for investments, including all tables. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 6 -Section 10 -Paragraph (c) -Subparagraph (1) + Details
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