NEW YORK (AP) â¿¿ Stocks that moved substantially or traded heavily Tuesday on the New York Stock Exchange and the Nasdaq Stock Market: NYSE J.C. Penney Co., down $1.94 at $13.93 The troubled department store chain ousted CEO Ron Johnson and replaced him with his predecessor, Mike Ullman. Corrections Corp. of America, up $1.06 at $39.03 The prison operator said that its board declared a special dividend of about $6.63 per share. Cliffs Natural Resources Inc., up $1.66 at $20.45 Shares of the mining company rose after a weekend Barron's article said its shares might double in the next year. Suntech Power Holdings Co. Ltd., up 14 cents at 62 cents Bloomberg News said a Chinese news service reported that Warren Buffett may be interested in buying the solar company. Nasdaq A. Schulman Inc., down $3.82 at $25.93 The plastic compounds supplier's fiscal second-quarter results were hurt by Europe's economic problems. Crocs Inc., down 45 cents at $15.06 A Stifel Nicolaus analyst said in a note to clients that the footwear maker's sales might be hurt by cool early spring weather. Staar Surgical Co., up 60 cents at $6.11 The implantable lens maker expects to report about $18 million in sales during the first quarter, more than Wall Street expected. Ziopharm Oncology Inc., up 9 cents at $1.71 The developer of cancer treatments reported encouraging results from a preclinical trial of one of its cancer therapies.