 Shares of Chemours Co. CC, 1.99 rallied more than 6 in the extended session Thursday after the chemical company reported better-than-expected adjusted profit and sales, and increased its cash-flow outlook. Chemours said it earned 201 million, or 1.26 a share, in the second quarter, compared with 66 million, or 39 cents a share, in the year-ago quarter. 