ZURICH (Reuters) - Swiss bank UBS warned on its first-quarter performance when posting quarterly profit at the bottom end of expectations after a loss at its investment bank, amid uncertainty around the euro zone, Europe's banking system, and U.S. deficit issues.

ATHENS (Reuters) - Greek leaders face crunch talks on Tuesday to agree on unpopular reforms to secure a 130-billion-euro ($170 billion) bailout and avert a chaotic debt default which could threaten its future in the euro zone.

TOKYO (Reuters) - Toyota Motor Corp reported a stronger-than-expected quarterly operating profit, shrugging off a firm yen and the damaging impact of flooding in Thailand, and raised its annual forecast, helped by cost cuts and Japanese government subsidies.

TOKYO (Reuters) - Greek resistance to the strict conditions attached to a bailout fund on Tuesday sapped recent momentum in markets spurred by hopes the global economy is improving, and the euro fell on renewed fears of a messy debt default.

(Reuters) - The Securities and Exchange Commission (SEC) will unveil proposals aimed at stabilizing money-market funds in the event of another financial panic, the Wall Street Journal reported on Tuesday, citing people familiar with the matter.

NEW YORK (Reuters) - Facebook's corporate governance rules, which give shareholders little say in how the social networking website would be run as a public company, are raising the hackles of one of the largest U.S. investors, the California State Teachers' Retirement System.

WASHINGTON (Reuters) - Key U.S. senators raised fresh questions about Lockheed Martin Corp's $382 billion F-35 fighter program on Monday as the Pentagon's top weapons buyer underscored deep flaws in the way the multinational arms program was set up from the start.

LOS ANGELES (Reuters) - Metro-Goldwyn Mayer said its lenders agreed to loan the studio $500 million to retire debt it took on when it emerged from bankruptcy about a year ago and to expand its film and TV production.

BOSTON (Reuters) - Last year's hedge fund losers may be turning into winners again.

(Reuters) - KFC parent Yum Brands Inc reported fourth-quarter earnings that topped Wall Street's view after accelerating sales and operating profit at established restaurants in China helped ease worries that growth in its top market was slowing.

NEW YORK (Reuters) - Stocks closed slightly lower on Monday as lingering questions about Europe's debt crisis and corporate earnings overshadowed growing optimism about economic growth after a five-week rally.

(Reuters) - A multi-state mortgage settlement in the works for more than a year will likely be pushed back again as dissident U.S. states continue to press specific concerns and ignore a Monday deadline to decide whether they will sign it.

(Reuters) - Investors suing Bank of America Corp won class-action status for their lawsuit accusing the bank of fraudulently misleading them about the 2008 takeover of Merrill Lynch & Co and the size of Merrill's losses and bonus payouts.

(Reuters) - KFC parent Yum Brands Inc reported fourth-quarter earnings that topped Wall Street's view after accelerating sales and operating profit at established restaurants in China helped ease worries that growth in its top market was slowing.

WASHINGTON (Reuters) - Congress made a mistake when it stripped away most of the Securities and Exchange Commission's authority to police the holding companies of broker-dealers for risks, according to the SEC's newest commissioner.

WASHINGTON (Reuters) - Ford Motor Co said on Monday it had decided not to participate in a new Pentagon competition to replace the U.S. military's fleet of workhorse Humvee vehicles.

Feb. 6 - Summary of business headlines: Wall Street ends lower; Yum Brands exceeds Wall Street's appetite; Boeing discovers 787 problem; Google, Facebook face Indian censorship. Conway G. Gittens reports.

(Reuters) - In its chaotic final days, MF Global's floundering brokerage used increasingly large chunks of customer money in an effort to keep the company afloat, creating a massive shortfall in customer funds, the trustee liquidating the brokerage has found.

Feb 06 - The Super Bowl ads were the co-stars of the show, with car companies as the lead players and a lot of drama that continues well after the big game. Bobbi Rebell reports.

(Reuters) - A former broker of a UBS AG unit can keep $1 million of a signing bonus he received when joining the firm, despite leaving earlier than terms of the bonus required, according to a ruling by an arbitration panel.