Best Buy Co., the largest U.S. electronics retailer, posted its biggest profit increase in a year on rising demand for flat-panel televisions. The shares rose 5.4 percent, the biggest gain in more than four months.

Net income rose 38 percent to $234 million, or 47 cents per share, from $170 million, or 34 cents, a year ago, beating analysts' estimates. Sales in the fiscal first quarter through May 27 climbed 14 percent to $6.96 billion, the Richfield, Minn.-based company said Tuesday.

Goldman Sachs Group Inc., the world's biggest securities firm by market value, said fiscal second-quarter earnings more than doubled. The company's shares fell for a second day on concern that slumping stock markets and rising interest rates will limit profit growth.

Net income climbed to $2.31 billion, or $4.78 a share, in the quarter ended May 26, capping the most profitable first half for any firm in the history of the securities industry.

Yum Brands Inc.'s KFC chain failed to tell customers that its fried chicken combo meals and other products were laden with unhealthy fats, a lawsuit filed by a consumer group charges.

The fast-food chain prepares its products using partially hydrogenated oil with so-called trans fats that increase the risk of heart disease, according to a civil complaint filed in Superior Court of the District of Columbia. The lawsuit seeks as much as $74,000 for every person who wasn't warned about these fats before eating at KFC restaurants in the nation's capital in the past three years.

KFC sells more items with trans fats than other chains, said Steve Gardner, litigation director for the Center for Science in the Public Interest, the advocacy group that filed the lawsuit.

Williams Cos., the biggest U.S. natural-gas transporter, agreed to settle for $290 million class-action lawsuits by shareholders accusing the company of inflating the value of telecommunications and energy-trading businesses.

Settlement costs of $98 million to $148 million, or 16 cents to 24 cents per share, will be recorded this quarter, Tulsa, Okla.-based Williams said Tuesday. The company expects to pay out $145 million to $220 million in cash, with insurance covering the rest.

>Krispy Kreme Doughnuts Inc., the second largest U.S. doughnut chain, probably posted a first-quarter loss and said it has enough cash to continue operations.

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