Quarterly report pursuant to Section 13 or 15(d)

NET INTEREST INCOME/EXPENSE (Details)

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NET INTEREST INCOME/EXPENSE (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2023
Dec. 31, 2022
Interest income:        
Interest income on trading securities $ 112,860 $ 44,760 $ 313,739 $ 116,922
Interest income on margin loans to customers 51,553 12,379 111,306 27,259
Interest income on loans to customers 49,529 12,327 123,730 24,158
Interest income on securities available-for-sale 7,478 6,727 25,476 13,280
Interest income on reverse repurchase agreements and amounts due from banks 5,025 4,062 12,012 6,198
Other interest income     2,594 0
Total interest income 226,445 80,255 588,857 187,817
Interest expense:        
Interest expense on securities repurchase agreement obligations 110,778 39,958 303,242 105,466
Interest expense on customer accounts and deposits 15,653 11,149 49,120 24,780
Interest expense on margin lending payable 3,211 0 9,671 0
Interest expense on debt securities issued 1,491 842 3,387 2,457
Interest expense on loans received 36 88 89 268
Other interest expense 54 0 141 0
Total interest expense 131,223 52,037 365,650 132,971
Net interest income $ 95,222 $ 28,218 $ 223,207 $ 54,846