“Samsung Electronics Co. (005930) fell the most in more than seven weeks in Seoul trading after it rested its case in a patent-infringement trial with Apple Inc. (AAPL) in California,” Saeromi Shin and Jun Yang report for Bloomberg.

“The stock of the world’s largest maker of TVs and mobile phones dropped 3.7 percent and was the biggest drag on the MSCI Emerging Markets Index,” Shin and Yang report. “Apple sued Samsung in April 2011, accusing it of copying patented designs for mobile devices such as iPhones… Apple accounts for about 9 percent of Samsung’s revenue, making it the company’s biggest customer, according to a Bloomberg supply-chain analysis. Samsung is the exclusive manufacturer of Apple-designed chips for iPhones and iPads.”

Shin and Yang report, “Samsung slid to 1,295,000 won at the close of trading in Seoul today, the biggest decline since June 25.”

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