Movers Roundup: Citigroup, E-Trade

Among the stock activity stories for Monday, Aug. 31, from AP Financial News:

BOSTON (AP) — Shares of Citigroup Inc. fell more than 4 percent after the financial magazine Barron's suggested the stock's rise above the $5-a-share mark may have been overdone.

NEW YORK (AP) — Shares of E-Trade Financial Corp. shot up in very heavy trading after private equity firm Citadel Investment Group LLC canceled plans to sell a big chunk of its stake in the online brokerage. Some on Wall Street saw the cancellation as a possible sign of bigger news for the company.

NEW YORK (AP) — A UBS analyst downgraded soft-drink bottler Coca-Cola FEMSA to "Sell" from "Neutral" on the risk of rising sweetener costs, a possible soda tax in Mexico and potential currency headwinds.

NEW YORK (AP) — Shares of science and engineering company Exponent Inc. jumped after Standard & Poor's said it was substituting the shares for those of Kirby Corp., a boat and diesel engine company, in the S&P SmallCap 600 index.

HARTFORD, Conn. (AP) — Shares of Kforce Inc. fell after the staffing company said it will take a $3.6 million charge in the third quarter for stock-related compensation.