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NET INTEREST INCOME/EXPENSE (Tables)

12 Months Ended

Mar. 31, 2024

Interest Income (Expense), Net [Abstract]

Interest Income and Interest Expense Disclosure

Net interest income/expense includes:


			Year ended March 31, 2024						Year ended March 31, 2023						Year ended March 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			—						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						—
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