By Matthew Goldstein (Reuters) - Billionaire hedge fund manager Steven A. Cohen is losing the financial support of Blackstone Group Inc, the largest outside investor in his embattled SAC Capital Advisors, which is yanking much of its client money, according to a letter reviewed by Reuters. A pension consultant, in a May 21 letter to clients, said Blackstone has notified Cohen that it intends to "fully redeem" a significant portion of the roughly $550 million the investment firm has invested with the $15 billion hedge fund. ...

By Jennifer Saba (Reuters) - News Corp said on Friday it will write down the value of its Australian and U.S. publishing assets by up to $1.4 billion, as the company prepares to split its business between its newspaper and entertainment operations. The company said the goodwill impairment charge was primarily for its Australia newspapers though it gave no more details. It also said it expected reduced cash flows in the future. The charge will be taken in the quarter ending June 30 and could effectively wipe out News Corp's profit. ...

By Karen Jacobs (Reuters) - US Airways Group and American Airlines , seeking approval for a merger that would create the world's largest airline, are warning lawmakers that a requirement to divest certain airport slots would lead to less service for small and medium-sized cities, sources close to the effort told Reuters. The airlines may be required to shed slots Washington's Reagan National Airport to prevent market domination. There is concern that those slots could go to rivals, such as JetBlue Airways , which would likely use them for flights to major cities. ...

By Ilaina Jonas NEW YORK (Reuters) - General Growth Properties Inc has paired with Brookfield Office Properties Inc to bid for an expensive New York building in what could mark the No. 2 U.S. mall owner's entry into a new segment of the retail real estate market, according to two sources familiar with the deal. Bids for the 27-story office and retail building at 650 Madison Avenue, one of the toniest shopping and office districts in Manhattan, could exceed $1.3 billion, the sources said. Other bidders include Vornado Realty Trust , one of the sources said. ...