NEW YORK (AP) â¿¿ Stocks that moved substantially or traded heavily Tuesday on the New York Stock Exchange and Nasdaq Stock Market: NYSE Morgan Stanley, down 21 cents to $15.17 The bank reached a settlement with MBIA that it says cuts risky assets, increases a key capital measure and resolves litigation. K12 Inc., down $6.79 at $22 The New York Times published a story that was critical of the educational value of the company's online schools. Seaspan Corp., up $1.71 at $12.16 The shipping company plans to buy back up to 10 million of its shares at a 43.5 percent premium to Tuesday's closing price. Marathon Oil Corp., up 32 cents at $27.64 A Deutsche Bank analyst upgraded the oil company's stock, saying Marathan will benefit from oil demand outstripping supply growth. Ivanhoe Mines Ltd., down $4.69 at $16.01 Rio Tinto may consider raising its stake in Ivanhoe, but says it doesn't currently plan a takeover bid for the copper and gold miner. Nasdaq Urban Outfitters Inc., up $1.41 at $27.87 The retailer said a key revenue measure is rising as the industry heads into the critical holiday shopping period. Endocyte Inc., down $6.72 at $3.57 The biopharmaceutical company's stock slid after it released results of a recent clinical trial of its lead drug candidate. Cabot Microelectronics Corp., up $5.78 at $45.99 The chip equipment maker plans a special $15 dividend in early 2012, and increased the money available for stock buybacks.