Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2021	Sep. 30, 2020
ASSETS
Cash and cash equivalents	$ 1,001.5	$ 952.6
Cash, securities and other assets segregated under federal and other regulations (including $102.5 million and $2.6 million at fair value at March 31, 2021 and September 30, 2020, respectively)	2,102.9	1,920.2
Collateralized transactions:
Securities purchased under agreements to resell	2,297.2	1,696.2
Securities borrowed	1,735.3	1,440.0
Deposits with and receivables from broker-dealers, clearing organizations and counterparties, net (including $839.8 million and $1,775.8 million at fair value at March 31, 2021 and September 30, 2020, respectively)	4,361.1	3,629.9
Receivable from clients, net (including $1.0 million and $1.5 million at fair value at March 31, 2021 and September 30, 2020, respectively)	479.4	411.4
Notes receivable, net	6.7	1.7
Income taxes receivable	14.8	16.6
Financial instruments owned, at fair value (includes securities pledged as collateral that can be sold or repledged of $564.7 million and $468.6 million at March 31, 2021 and September 30, 2020, respectively)	2,913.1	2,727.7
Physical commodities inventory, net (including $355.2 million and $215.7 million at fair value at March 31, 2021 and September 30, 2020, respectively)	450.8	281.1
Deferred income taxes, net	35.2	36.9
Property and equipment, net	86.1	62.1
Operating right of use assets	97.1	101.5
Goodwill and intangible assets, net	102.5	109.5
Other assets	116.0	87.5
Total assets	15,799.7	13,474.9
Liabilities:
Accounts payable and other accrued liabilities (including $1.5 million and $1.5 million at fair value at March 31, 2021 and September 30, 2020, respectively)	281.8	272.6
Operating lease liabilities	116.4	118.7
Payables to:
Clients (including $(178.2) million and $(222.7) million at fair value at March 31, 2021 and September 30, 2020, respectively)	6,544.5	5,689.0
Broker-dealers, clearing organizations and counterparties (including $43.7 million and $14.7 million at fair value at March 31, 2021 and September 30, 2020, respectively)	520.7	537.5
Lenders under loans	314.9	268.1
Senior secured borrowings, net	512.0	515.5
Income taxes payable	16.6	22.6
Collateralized transactions:
Securities sold under agreements to repurchase	3,767.2	3,155.5
Securities loaned	1,747.2	1,441.9
Financial instruments sold, not yet purchased, at fair value	1,118.2	686.0
Total liabilities	14,939.5	12,707.4
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 30,000,000 shares; 22,205,997 issued and 19,784,040 outstanding at March 31, 2021 and 21,798,551 issued and 19,376,594 outstanding at September 30, 2020	0.2	0.2
Common stock in treasury, at cost - 2,421,957 shares at March 31, 2021 and September 30, 2020, respectively	(57.6)	(57.6)
Additional paid-in-capital	304.4	292.6
Retained earnings	641.0	572.4
Accumulated other comprehensive loss, net	(27.8)	(40.1)
Total equity	860.2	767.5
Total liabilities and stockholders' equity	$ 15,799.7	$ 13,474.9