Annual report [Section 13 and 15(d), not S-K Item 405]

NET INTEREST INCOME/EXPENSE (Details)

v3.26.1
NET INTEREST INCOME/EXPENSE (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Interest income:      
Interest income on loans to customers $ 283,657 $ 207,802 $ 176,539
Interest income on margin loans to customers 277,633 212,360 175,571
Interest income on trading securities 191,021 378,350 426,428
Interest income on held-to-maturity securities 49,670 1,000 0
Interest income on available-for-sale securities 58,276 40,297 32,821
Interest income on reverse repurchase agreements and amounts due from banks 21,208 24,644 16,865
Other interest income 1,013 0 0
Total interest income 882,478 864,453 828,224
Interest expense:      
Interest expense on customer accounts and deposits 204,578 111,541 70,778
Interest expense on securities repurchase agreement obligations 162,760 340,863 402,665
Interest expense on debt securities issued 81,757 36,130 10,356
Interest expense on margin lending payable 31,687 45,748 16,990
Interest expense on loans received 2,950 1,568 124
Other interest expense 5,304 45 198
Total interest expense 489,036 535,895 501,111
Net interest income $ 393,442 $ 328,558 $ 327,113