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NET INTEREST INCOME/EXPENSE (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Jun. 30, 2025 | Jun. 30, 2024
Interest income: |  |
Interest income on loans to customers | $ 61,694 | $ 52,367
Interest income on margin loans to customers | 60,289 | 51,067
Interest income on trading securities | 52,576 | 107,128
Interest income on securities available-for-sale | 13,383 | 8,400
Interest income on reverse repurchase agreements and amounts due from banks | 5,456 | 7,042
Interest income on held-to-maturity securities | 5,173 | 0
Interest income | 198,571 | 226,004
Interest expense: |  |
Interest expense on securities repurchase agreement obligations | 45,461 | 92,407
Interest expense on customer accounts and deposits | 39,332 | 23,127
Interest expense on debt securities issued | 13,751 | 6,969
Interest expense on margin lending payable | 13,374 | 23,123
Interest expense on loans received | 510 | 44
Other interest expense | 982 | 48
Total interest expense | 113,410 | 145,718
Net interest income | $ 85,161 | $ 80,286

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