MF Global files for bankruptcy, according to a court filing.

Did Corzine’s risk taking cripple MF Global?

Charlie Gasparino sets the stage for MF Global’s current situation.

Australia’s Qantas Airways has seen its share of suitors knocking on the company’s cabin doors before, and with the stock trading at record lows, now may seem to be a good time to welcome a white knight.

Chinese groups Pang Da and Youngman will pump more than half a billion euros ($709 million) into Swedish carmaker Saab, aiming to return the struggling carmaker to profit by 2014.

EMI, once the glamorous monarch of the British music industry, is about to be sold by Citigroup. Reuters lays out EMI’s future and who is likely to walk away with the company’s recorded music and song catalog.

Despite all the rumored interest in Yahoo, progress on a deal has hit a brick wall mainly due to the company’s lack of strategy and restrictive confidentiality agreement, people familiar with the situation said.

Google unveiled big changes to its fledgling daily deals business in the midst of rival Groupon’s IPO roadshow.

“With 57 completed deals under its belt this year, Google has already smashed its 2010 record of 48 acquisitions — and it is only October,” reports DealBook.

Sony is to take over its mobile phone joint venture with Ericsson for 1.05 billion euros ($1.5 billion), as it seeks to exploit its music and video to help it catch smartphone leaders such as Apple.

U.S. patent records point to a possible conflict of interest in an Olympus investment in a cookware company, raising more questions for investors demanding a full explanation from the Japanese company of acquisitions that made heavy losses.

Olympus Corp head Tsuyoshi Kikukawa resigned after a scandal over hefty advisory fees wiped out half of the 92-year-old firm’s market value, but his successor stuck with the company’s line that it had done nothing wrong.

KKR  plans to launch a new pan-Asia fund to raise up to $6 billion in the first quarter of 2012, two sources with knowledge of the matter told Reuters, underlining the global buyout industry’s bullish view on Asia’s economic growth.

ArcelorMittal, the world’s largest steelmaker, has unexpectedly pulled out of its joint $5 billion bid with Peabody Energy for Australian miner Macarthur Coal, just a day after the buyers said they had secured a majority of shares.

New Hope Corp, the $5 billion Australian coal miner that put itself up for auction earlier this month is considering a break-up and asset sales amid interest from global resource companies, two sources said.

The FBI is investigating the massive advisory fee involved in Olympus Corp’s takeover of a British company, a person familiar with the probe said, in a deepening scandal that has wiped out more than half the company’s value.

WikiLeaks will have to stop publishing secret cables and devote itself to fund-raising if it is unable to end a financial “blockade” by U.S. firms such as Visa and MasterCard by the end of the year, founder Julian Assange said.

Health insurer Cigna will buy HealthSpring for about $3.8 billion to jump-start its business selling Medicare plans for the elderly.

Oracle struck a deal to buy RightNow Technologies for around $1.5 billion, agreeing to pay a nearly 20 percent premium for the cloud-based customer service company.

Groupon plans to raise as much as $540 million in an initial public offering, less than previously planned, as the daily deals website grapples with a weak equity market, executive departures and questions about its accounting and business model.

Saab moved closer to collapse on Friday as its owner rejected the latest rescue proposal from reluctant Chinese investors and its court-appointed administrator said the Swedish carmaker lacked the cash to carry on.

Groupon is planning to launch a roadshow for its initial public offering next week, on Monday or Tuesday, three sources familiar with the situation said.

Nasdaq expects between 15 and 20 more U.S. initial public offerings before the end of the year, a top executive at the company told Reuters. The company had initially foreseen as many as 120 IPOs in 2011, but the final tally for the year could come at 80 percent of that because of volatility in global markets.