Exhibit 12.1

Computation of Ratio of Earnings to Fixed Charges

The following table presents the ratio of earnings to fixed charges for us and our consolidated subsidiaries for each of the periods indicated, including GFI beginning with the quarter ended March 31, 2015. For the purposes of calculating the ratio of earnings to fixed charges, “earnings” consist of income from operations before income taxes and fixed charges, net. “Fixed charges” consist of interest expense incurred on all indebtedness, amortized premiums, discounts and capitalized expenses relating to indebtedness and interest within rental expense. Neither we nor any of our consolidated subsidiaries had any preferred shares outstanding for any of the periods reflected in this table.

	Six Months Ended June 30, 2015		Year Ended December 31,
			2014		2013		2012		2011		2010
	(dollars in thousands)
Earnings:
Income from operations before income taxes (1)		$51,923	$	5,433	$	275,429	$	67,512	$	60,964	$	63,855
Add: Fixed charges, net (2)(3)		34,344		37,949		39,932		36,385		25,606		15,409
Income from operations before income taxes and fixed charges, net		$86,267	$	43,382	$	315,361	$	103,897	$	86,570	$	79,264
Fixed charges:
Total interest expense		$30,980	$	32,297	$	32,411	$	29,419	$	22,798	$	14,080
Amortized premiums, discounts and capitalized expenses related to indebtedness		3,361		5,648		5,921		5,466		1,808		129
Interest within rental expense		3		4		1,600		1,500		1,000		1,200
Total fixed charges		$34,344	$	37,949	$	39,932	$	36,385	$	25,606	$	15,409
Ratio of earnings to fixed charges		2.5		1.1		7.9		2.9		3.4		5.1

(1) Income from operations before income taxes does not include gains or losses from equity investees.

(2) Fixed charges reflect our 5.375% Senior Notes from their issuance on December 9, 2014 and the 8.375% GFI Notes and the balance outstanding under the GFI Second Amended and Restated Credit Agreement, dated as of December 20, 2010, which we refer to as the “GFI Credit Agreement,” from March 2, 2015. Fixed charges also reflect our 8.75% Convertible Senior Notes due April 15, 2015, which were converted in full into Class A common stock on April 13, 2015.

(3) Does not reflect the reduction in the penalty interest rate payable on the 8.375% GFI Notes effective July 19, 2015, our borrowing of $100,000,000 from Cantor on October 1, 2015 under a Revolving Credit Agreement, dated as of October 1, 2015, between us and Cantor, or GFI’s repayment of its $75,000,000 then-outstanding balance under the GFI Credit Agreement, with the proceeds of a $75,000,000 loan from us, on October 2, 2015.