Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Dec. 31, 2023	Sep. 30, 2023
ASSETS
Cash and cash equivalents	$ 1,157.6	$ 1,108.3
Cash, securities and other assets segregated under federal and other regulations (including $3.5 million and $5.8 million at fair value at December 31, 2023 and September 30, 2023, respectively)	2,774.6	2,426.3
Collateralized transactions:
Securities purchased under agreements to resell	3,799.8	2,979.5
Securities borrowed	994.5	1,129.1
Deposits with and receivables from broker-dealers, clearing organizations and counterparties, net (including $3,769.3 million and $4,248.3 million at fair value at December 31, 2023 and September 30, 2023, respectively)	7,474.1	7,443.8
Receivable from clients, net (including $1.1 million and $(7.9) million at fair value at December 31, 2023 and September 30, 2023, respectively)	825.6	683.1
Notes receivable, net	5.3	5.2
Income taxes receivable	20.8	25.1
Financial instruments owned, at fair value (includes securities pledged as collateral that can be sold or repledged of $1,870.2 million and $1,466.4 million at December 31, 2023 and September 30, 2023, respectively)	5,064.4	5,044.8
Physical commodities inventory, net (including $314.4 million and $386.5 million at fair value at December 31, 2023 and September 30, 2023, respectively)	518.4	537.3
Deferred tax asset	37.4	45.4
Property and equipment, net	127.0	123.5
Operating right of use assets	137.9	122.1
Goodwill and intangible assets, net	80.5	82.4
Other assets	226.9	182.8
Total assets	23,244.8	21,938.7
Liabilities:
Accounts payable and other accrued liabilities (including $1.6 million and $1.5 million at fair value at December 31, 2023 and September 30, 2023, respectively)	446.3	533.0
Operating lease liabilities	169.3	149.3
Payables to:
Clients (including $453.0 million and $79.8 million at fair value at December 31, 2023 and September 30, 2023, respectively)	10,048.6	9,976.0
Broker-dealers, clearing organizations and counterparties (including $51.5 million and $10.2 million at fair value at December 31, 2023 and September 30, 2023, respectively)	541.5	442.4
Lenders under loans	418.5	341.0
Senior secured borrowings, net	342.9	342.1
Income taxes payable	41.2	38.2
Deferred tax liability	8.8	8.1
Collateralized transactions:
Securities sold under agreements to repurchase	6,054.2	4,526.6
Securities loaned	942.7	1,117.3
Financial instruments sold, not yet purchased, at fair value	2,748.0	3,085.6
Total liabilities	21,762.0	20,559.6
Commitments and contingencies (Note 11)
Stockholders' equity:
Preferred stock, $0.01 par value. Authorized 1,000,000 shares; no shares issued or outstanding	0.0	0.0
Common stock, $0.01 par value. Authorized 200,000,000 shares; 35,405,165 issued and 31,494,180 outstanding at December 31, 2023 and 35,105,852 issued and 31,194,867 outstanding at September 30, 2023	0.4	0.4
Common stock in treasury, at cost. 3,910,985 shares at December 31, 2023 and September 30, 2023	(69.3)	(69.3)
Additional paid-in-capital	378.7	371.7
Retained earnings	1,197.2	1,128.1
Accumulated other comprehensive loss, net	(24.2)	(51.8)
Total equity	1,482.8	1,379.1
Total liabilities and stockholders' equity	$ 23,244.8	$ 21,938.7