Oct. 25 (Bloomberg) -- OCI Co. retreated as much as 5.5 percent in Seoul trading after brokerages, including Hana Daetoo Securities Co. and KTB Investment & Securities Co., cut share price estimates. South Korea’s biggest polysilicon maker traded 3.6 percent lower at 212,000 won as of 9:09 a.m. on the Korea Exchange. The benchmark Kospi Index added 0.2 percent. OCI’s operating profit may decline in the fourth quarter on weak polysilicon prices, Lee Jung Heon, an analyst at Hana, said in a report today.
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