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DILUTED EARNINGS PER SHARE OF $ 1.00 , ADJUSTED DILUTED EARNINGS PER SHARE¹ OF $ 0.82 . PRETAX INCOME OF $ 541 MILLION ON $ 754 MILLION IN NET REVENUES . ADJUSTED PRETAX INCOME OF $ 437 MILLION ON $ 650 MILLION IN ADJUSTED NET REVENUES¹ . DECLARES QUARTERLY DIVIDEND OF $ 0.10 PER SHARE . GREENWICH , CONN , July 20 , 2021 - Interactive Brokers Group , Inc. ( Nasdaq : IBKR ) , an automated global electronic broker , reported diluted earnings per share of $ 1.00 for the quarter ended June 30 , 2021 compared to $ 0.40 for the same period in 2020 , and adjusted diluted earnings per share of $ 0.82 for this quarter compared to $ 0.57 for the year ago quarter . INTERACTIVE BROKERS GROUP ANNOUNCES 2Q2021 RESULTS Net revenues were $ 754 million and income before income taxes was $ 541 million for this quarter , compared to net revenues of $ 539 million and income before income taxes of $ 222 million for the same period in 2020. Adjusted net revenues were $ 650 million and adjusted income before income taxes was $ 437 million for this quarter , compared to adjusted net revenues of $ 523 million and adjusted income before income taxes of $ 310 million for the same period in 2020 . Financial Highlights ● ● ● Commission revenue increased $ 31 million , or 11 % , from the year - ago quarter on higher customer stock and options trading volumes within an active trading environment . Net interest income increased $ 78 million , or 40 % , from the year - ago quarter on higher margin loan balances and strong securities lending activity . Other income increased $ 91 million from the year - ago quarter . This increase was mainly comprised of ( 1 ) $ 99 million related to our strategic investment in Up Fintech Holding Limited ( " Tiger Brokers " ) , which increased to a $ 113 million mark - to - market gain this quarter from a $ 14 million mark - to - market gain in the same period in 2020 ; and ( 2 ) $ 13 million related to our U.S. government securities portfolio , which lost $ 0.2 million this quarter compared to a $ 13 million loss in the same period in 2020 ; partially offset by ( 3 ) $ 25 million related to our currency diversification strategy , which lost $ 9 million this quarter compared to a gain of $ 16 million in the same period in 2020 . General and administrative expenses decreased $ 97 million from the year - ago quarter , primarily due to the non recurrence of $ 103 million in expenses incurred to compensate certain affected customers in connection with their losses on West Texas Intermediate Crude Oil contracts in April 2020 , as previously disclosed . 72 % pretax profit margin for this quarter , up from 41 % in the year - ago quarter . 67 % adjusted pretax profit margin for this quarter , up from 59 % in the year - ago quarter . Total equity of $ 9.9 billion . The Interactive Brokers Group , Inc. Board of Directors declared a quarterly cash dividend of $ 0.10 per share . This dividend is payable on September 14 , 2021 to shareholders of record as of September 1 , 2021 . 1 See the reconciliation of non - GAAP financial measures starting on page 10 . 1