Annual report pursuant to Section 13 and 15(d)

NET INTEREST INCOME/EXPENSE (Details)

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NET INTEREST INCOME/EXPENSE (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Interest income:      
Interest income on trading securities $ 426,428 $ 178,288 $ 78,327
Interest income on loans to customers 176,539 43,486 4,617
Interest income on margin loans to customers 175,571 34,558 14,164
Interest income on securities available-for-sale 32,821 27,003 22,437
Interest income on reverse repurchase agreements and amounts due from banks 16,865 9,836 1,658
Other interest income 0 1,524 406
Total interest income 828,224 294,695 121,609
Interest expense:      
Interest expense on securities repurchase agreement obligations 402,665 158,595 58,229
Interest expense on customer accounts and deposits 70,778 40,335 16,336
Interest expense on margin lending payable 16,990 6,635 0
Interest expense on debt securities issued 10,356 3,085 1,822
Other interest expense 322 297 560
Total interest expense 501,111 208,947 76,947
Net interest income $ 327,113 $ 85,748 $ 44,662