NET INTEREST INCOME/EXPENSE (Tables)

12 Months Ended

Mar. 31, 2026

Interest Income (Expense), Operating [Abstract]

Schedule of net interest income/expense

Net interest income/expense includes:


			Year ended March 31, 2026						Year ended March 31, 2025						Year ended March 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 available-for-sale securities			58,276						40,297						32,821
Interest income on held-to-maturity securities			49,670						1,000						—
Interest income on reverse repurchase agreements and amounts due from banks			21,208						24,644						16,865
Other interest income			1,013						—						—
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