| Schedule of securities under repurchase agreement obligations | As of September 30, 2024, and March 31, 2024, trading securities included collateralized securities subject to repurchase agreements as described in the following table: 
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  | September 30, 2024 |  
|  | Interest rates and remaining contractual maturity of the agreements |  
|  | 
Average interest rate 
 |  | Up to 30 days |  | 30-90 days |  | Total |  
| 
Securities sold under repurchase agreements 
 |  |  |  |  |  |  |  |  
| Non-US sovereign debt | 13.41 | % |  | $ | 1,711,209 |  |  | $ | 83,726 |  |  | $ | 1,794,935 |  |  
| Corporate debt | 13.38 | % |  | 730,278 |  |  | 56,496 |  |  | 786,774 |  |  
| US sovereign debt | 3.00 | % |  | 2,400 |  |  | — |  |  | 2,400 |  |  
| Corporate equity | 1.00 | % |  | 22 |  |  | — |  |  | 22 |  |  
| Total securities sold under repurchase agreements |  |  | $ | 2,443,909 |  |  | $ | 140,222 |  |  | $ | 2,584,131 |  | 
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  | March 31, 2024  |  
|  | Interest rate and remaining contractual maturity of the agreements |  
|  | 
Average interest rate 
 |  | Up to 30 days |  | 30-90 days |  | Total |  
| 
Securities sold under repurchase agreements 
 |  |  |  |  |  |  |  |  
| Non-US sovereign debt | 13.78 | % |  | $ | 1,545,080 |  |  | $ | 259,948 |  |  | $ | 1,805,028 |  |  
| Corporate debt | 13.84 | % |  | 923,752 |  |  | 14,644 |  |  | 938,396 |  |  
| US sovereign debt | 3.06 | % |  | 13,172 |  |  | — |  |  | 13,172 |  |  
| Total securities sold under repurchase agreements |  |  | $ | 2,482,004 |  |  | $ | 274,592 |  |  | $ | 2,756,596 |  |  |