Exhibit 99.1

MF Global Reports First Fiscal Quarter 2012 Earnings

Company Delivers GAAP Profitability on Higher Revenues

NEW YORK, July 28, 2011 – MF Global Holdings Ltd. (NYSE: MF), a broker-dealer providing trading and hedging solutions, today reported earnings for its first fiscal quarter ended June 30, 2011.

First Quarter Highlights

“With net revenue and GAAP net income at their highest levels in nearly three years, this quarter’s results reflect continued progress in MF Global’s ongoing transformation,” said Jon S. Corzine, chairman and CEO, MF Global. “We have made important strides in diversifying our revenue streams, expanding our trading capacity and upgrading talent, as well as in investing in the infrastructure necessary to execute our vision. We believe the depth and breadth of our transformation will continue as we enhance our capital markets offering, focus our global retail services, and more effectively organize our prime services capabilities.”

Mr. Corzine continued, “As we enter the final stages of the firm’s core restructuring, we continue to evaluate both organic and strategic actions to accelerate our strategy of building an investment bank that will deliver growing revenues and competitive returns on capital. Our ongoing evaluations and financial performance will dictate the timing of our investment and hiring initiatives.”

First Quarter 2012 Results

Revenue, net of interest and transaction-based expenses (net revenue), was $314.5 million for the first quarter, versus $289.4 million for the same period last year. The increase in net revenue was primarily due to the expansion of client facilitation and principal activities, particularly within structured equity finance, commodities and fixed income.

Net revenue per employee was approximately $110,000, up 18 percent for the first quarter, compared with approximately $93,000 for the same period last year.¹ At June 30, 2011, the company had 2,857 employees, compared with 3,024 employees at June 30, 2010.

GAAP net income applicable to common shareholders was $7.7 million or $0.05 per basic and diluted share for the first quarter, compared with $0.8 million or $0.01 per basic and diluted share for the same period last year.²

Adjusted earnings were $19.5 million or $0.10 per fully diluted share for the first quarter, compared with $28.4 million or $0.16 per fully diluted share for the same period last year.³

“The evolution of our business model is taking shape, as client facilitation and principal activities accounted for nearly half of the firm’s overall revenue base,” said Henri Steenkamp, chief financial officer, MF Global. “At the same time, we remain diligent on costs, taking a strategic approach to our spending in order to advance our business objectives. Our compensation and non-compensation costs are within the expected range this quarter, and our efforts to identify opportunities to more efficiently manage our operations are ongoing.”

In the first quarter, on a GAAP basis, employee compensation and benefits expense (excluding non-recurring IPO awards) was $171.1 million, or 54.4 percent of net revenue, compared with $155.4 million, or 53.7 percent for the same period last year. Adjusted employee compensation and benefits expense was $170.4 million, or 54.2 percent of net revenue for the first quarter 2012, compared with $152.1 million, or 52.5 percent of net revenue for the same period last year.⁴ The employee compensation ratio increased due to ongoing recruitment and upgrading of personnel, compared with the downsizing actions implemented during the same period last year.

On a GAAP basis, non-compensation expense (which excludes restructuring costs) for the quarter was $112.2 million, compared with $91.4 million for the same period last year. Adjusted non-compensation expense totaled $109.5 million for the first quarter 2012, compared with $90.6 million for the same period last year.⁴ The increase in non-compensation expense for the quarter was primarily due to higher investment in communication and technology, occupancy and equipment plus professional fees.

Restructuring expense was $2.1 million for the quarter, compared with $9.9 million for the same period last year, reflecting the continued implementation of the company’s new strategic plan.

Client payables were $13.6 billion at June 30, 2011, and March 31, 2011.

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Business Developments

New Secured Committed Revolving Credit Facility

On June 29, MF Global’s U.S. broker-dealer closed on a new, 364-day, $300 million senior secured committed revolving credit facility with a syndicate of banks. The credit facility can be used for the broker-dealer’s general corporate purposes, which further increases its liquidity.

Senior Management Appointments

MF Global strengthened its operations function and sales efforts with the appointments of David Simons as global head of Operations and Benita Levy and John Brady as co-heads of the firm’s Chicago office. The firm also continued its efforts to attract leading industry talent in areas where there is opportunity to drive increased revenue, improve productivity and better serve clients, particularly in foreign exchange, high-yield/distressed and mortgage backed securities.

Established a Unified Brand and Marketing Approach

MF Global unified its brands around the world to better leverage its resources globally and ensure a consolidated, coordinated marketing approach. As the final step in this consolidation, Lind-Waldock, the firm’s flagship U.S. retail business, will change its name to MF Global next month.

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Conference Call Information

MF Global will hold a conference call to discuss the first fiscal quarter 2012 earnings today at 7:30 a.m. ET. The call is open to the public.

Dial-in information

U.S./Canada: +1.877.852.6543

International: +1.719.325.4769

Passcode: 9156964

Listeners to the call should dial in approximately 10 minutes prior to the start of the call.

Webcast information

A live audio webcast of the presentation will also be available on the investor relations section of the MF Global Web site, at http://www.mfglobalinvestorrelations.com, and will be available for replay shortly after the event.

About MF Global

MF Global (NYSE: MF) is one of the world’s leading brokers of commodities and listed derivatives. MF Global delivers trading and hedging solutions as a broker-dealer across all major markets for futures and options, commodities, fixed income, equities and foreign exchange. The firm is one of 20 primary dealers authorized to trade U.S. government securities with the Federal Reserve Bank of New York. The firm provides access to more than 70 exchanges around the world and is a leader by volume on many of the largest derivatives exchanges. MF Global helps clients discover and capitalize on market opportunities by providing actionable insight, market expertise and deep liquidity. For more information, please visit www.mfglobal.com.

Forward-Looking Statement

SAFE HARBOR STATEMENT UNDER THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995: Forward-looking statements in this press release, including statements relating to the MF Global future revenues and earnings, plans, strategies, objectives, expectations and intentions, are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Investors are cautioned that such forward-looking statements are inherently subject to risks and uncertainties, many of which cannot be predicted with accuracy, and some of which might not be anticipated. We caution you not to place undue reliance on these forward-looking statements. We refer you to MF Global’s latest Annual Report on Form 10-K on file with the Securities and Exchange Commission (SEC), and any amendments thereto, for a description of the risks and uncertainties it faces. This press release includes certain non-GAAP financial measures, as defined under SEC rules. A reconciliation of these measures is included in the financial information later in this release, which is also available on the Company’s website at www.mfglobal.com.

Investor Contact:

Media Contact:

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Non-GAAP Financial Measures (see also supplementary tables for reconciliation)

In this press release, we provide certain earnings per share ratios based on a fully diluted number of shares (“fully diluted shares”). In accordance with the regulations of the U.S. Securities and Exchange Commission (“SEC”), earnings per share ratios based on fully diluted shares are considered to be non-GAAP financial measures because fully diluted shares represent shares outstanding, as determined on a GAAP basis, with certain adjustments that are made outside of GAAP. We use fully diluted shares for certain ratios for the reasons described further below.

We also provide information related to “adjusted earnings per fully diluted share”, which represents “adjusted earnings” (a non-GAAP financial measure) divided by our fully diluted shares (also a non-GAAP financial measure). “Adjusted earnings” excludes the following items from “Net income applicable to common shareholders”: Certain legal settlements and related expenses; Restructuring; Impairment of goodwill; Stock compensation expense related to IPO awards; Severance expense; UK bonus tax; and Gains on exchange seats and shares. We use “adjusted earnings per fully diluted share” for the same reasons why we present fully diluted share ratios (as discussed below) and also because our management believes that the measure provides a more useful metric of our operating performance. In particular, we exclude a UK bonus tax and Stock compensation expense related to IPO awards because we believe that they reflect expenses arising from particular events that are not reasonably likely to reoccur. In addition, we exclude Certain legal settlements and related expenses; Restructuring; Impairment of goodwill; Severance expense; and Gains on exchange seats and shares because we believe that these gains and losses do not reflect our operating performance and do not help our shareholders understand or compare our past or future financial performance.

In this press release, we provide information related to “adjusted employee compensation and benefits (excluding non-recurring IPO awards)”, which is a non-GAAP financial measure that excludes Severance expense and a U.K. bonus tax. We use “adjusted employee compensation and benefits (excluding non-recurring IPO awards)” because our management believes this provides a more useful metric of our operating performance. In particular, we have excluded a U.K. bonus tax because we believe that this reflects an expense from a one-time event that is not likely to re-occur. Furthermore, we have excluded Severance expense because we do not believe that this amount reflects our operating performance and does not help our shareholders understand or compare our past or future financial performance.

In this press release, we provide information related to “adjusted non-compensation expenses”, which is a non-GAAP financial measure that excludes Certain legal settlements and related expenses and Impairment of goodwill. We use “adjusted non-compensation expenses” because our management believes this provides a more useful metric of our operating performance. In particular, we have excluded certain of the legal settlements and related expenses because we believe that these legal costs relate to matters that occurred before our initial public offering for losses incurred through introducing broker relationships. Furthermore, we have excluded Impairment of goodwill because we do not believe that this amount reflects our operating performance and does not help our shareholders understand or compare our past or future financial performance.

The presentation of fully diluted shares and ratios based on fully diluted shares are not intended to be considered in isolation from, as a substitute for or as superior to, the financial information prepared and presented in accordance with GAAP, and our presentation of this measure may be different from non-GAAP financial measures used by other companies.

To determine adjusted earnings per fully diluted share, both the numerator and denominator of the GAAP EPS calculation are adjusted. For the numerator, interest and amortization of issuance costs on our 1.875% and 9% Convertible Notes, net of tax and dividends on the Series A and Series B Preferred Stock are added back to net income applicable to common shareholders. For the denominator, weighted average shares of common stock outstanding is adjusted at June 30, 2010 to add back

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shares underlying restricted stock and stock unit awards (“IPO awards”) granted in connection with our IPO which are not considered dilutive under U.S. GAAP and, therefore, not included in diluted shares of common stock outstanding. These shares are not considered dilutive because, in part, of the value of these awards in relation to the market price of our shares of outstanding common stock. In addition, weighted average shares of common stock outstanding are also adjusted at June 30, 2011 and 2010 to include the impact of our outstanding Series A Preferred Stock, Series B Preferred Stock and 9% Convertible Notes, on an if-converted basis.

For the 1.875% Convertible Notes and related call spread overlay (purchased calls and sold warrants), weighted average shares of common stock outstanding are adjusted using the treasury stock method. There is no impact to fully diluted shares until our stock price exceeds the contractual conversion price of $10.37. At this time, the denominator is adjusted to include only the incremental shares required to settle the excess value over par of the convertible notes upon conversion. For the related sold warrants, there is a dilutive impact once our stock price exceeds the strike price of $14.23 and it is also measured under the treasury stock method assuming the proceeds from exercised warrants are used to repurchase outstanding shares. In calculating adjusted net income per fully diluted share, we also include the effect of the purchased calls upon settlement. The anti-dilutive impact of the purchased calls would fully offset the dilutive impact of the 1.875% Convertible Notes. At June 30, 2011, since the average common stock price does not exceed the conversion or strike price, there are no incremental shares included in the denominator.

For the three months ended June 30, 2011, weighted average shares of common stock outstanding is adjusted by 12.0 million, 3.9 million and 17.9 million shares, related to the Series A Preferred Stock, Series B Preferred Stock and 9% Convertible Notes, respectively. For the three months ended June 30, 2010, weighted average shares of common stock outstanding is adjusted for 3.3 million, 12.0 million, 14.4 million and 19.6 million shares, related to IPO awards, Series A Preferred Stock, Series B Preferred Stock and 9% Convertible Notes, respectively. We believe it is meaningful to investors to present ratios based on fully diluted shares because it demonstrates the dilution that investors will experience at the end of the three-year vesting period of our IPO awards and when our Series A Preferred Stock, Series B Preferred Stock and 9% Convertible Notes are converted. It is also how our management internally views dilution.

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MF Global Holdings Ltd.

Consolidated Statements of Operations

(Dollars in thousands, except share data)

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MF Global Holdings Ltd.

Consolidated Balance Sheets

(Dollars in thousands, except share data)

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Supplementary Data

The table below calculates principal transactions revenue, including the net interest generated from financing transactions related to principal transactions:

The table below provides an analysis of the components of principal transactions:

The table below provides an analysis of the components of net interest income for the periods presented:

The table below calculates net revenues from client payables and excess cash for the periods presented:

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Supplementary Data (continued)

The table below reconciles Employee compensation and benefits (excluding non-recurring IPO awards) to Adjusted employee compensation and benefits (excluding non-recurring IPO awards) for the periods presented:

The table below reconciles Non-compensation expenses to Adjusted non-compensation expenses for the periods presented:

The table below presents volumes for the periods presented:

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Supplementary Data (continued)

GAAP net income for the three months ended June 30, 2011 includes the following amounts and earnings per share effect based on a basic and fully diluted number of shares:

GAAP net income for the three months ended June 30, 2010 includes the following amounts and earnings per share effect based on a basic and fully diluted number of shares:

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