Annual report pursuant to Section 13 and 15(d)

TRADING AND AVAILABLE FOR SALE SECURITIES AT FAIR VALUE (Details)

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TRADING AND AVAILABLE FOR SALE SECURITIES AT FAIR VALUE (Details) - USD ($)
Mar. 31, 2021
Mar. 31, 2020
Trading securities $ 736,188,000 $ 156,544,000
Total Available-for-sale securities, at fair value 1,000 6,438,000
Certificate of deposit    
Total Available-for-sale securities, at fair value 0 5,076,000
Preferred Shares    
Total Available-for-sale securities, at fair value 0 284,000
Debt securities    
Total Available-for-sale securities, at fair value 0 405,000
Equity securities    
Trading securities 334,763,000 58,519,000
Total Available-for-sale securities, at fair value 1,000 1,000
Mutual investment funds    
Total Available-for-sale securities, at fair value 0 672,000
Non-U.S. sovereign debt    
Trading securities 333,619,000 28,495,000
U.S. sovereign debt    
Trading securities 10,828,000 0
Corporate equity    
Trading securities 47,340,000 69,530,000
Total Available-for-sale securities, at fair value 1,000 1,000
Exchange traded notes    
Trading securities $ 9,638,000 $ 0