By MarketWatch

NEW YORK (MarketWatch) -- Shares of the following companies were among those making moves of 5% or more in the U.S. stock market Monday afternoon:

Abercrombie & Fitch Co. /quotes/comstock/13*!anf/quotes/nls/anf (ANF 39.65, -0.32, -0.80%) shares gained 7.4% after the retailer was upgraded to outperform from neutral by Credit Suisse. Read Retail Stocks.

Adobe Systems Inc. /quotes/comstock/15*!adbe/quotes/nls/adbe (ADBE 34.79, -0.59, -1.67%) shares added 5.2% after Goldman Sachs lifted its rating on the software company to buy from neutral. See Market Pulse.

Applied Materials Inc. /quotes/comstock/15*!amat/quotes/nls/amat (AMAT 12.18, -0.11, -0.90%) added 5.2%, with the chip gear maker reporting quarterly results after Wednesday's close.

Ariad Pharmaceuticals Inc. /quotes/comstock/15*!aria/quotes/nls/aria (ARIA 2.19, -0.01, -0.46%) shares climbed 12% after J.P. Morgan advised buying the stock.

Developers Diversified Realty Corp. /quotes/comstock/13*!ddr/quotes/nls/ddr (DDR 9.63, +0.11, +1.16%) gained 9.4% after the real estate investment trust announced management changes. See Market Pulse.

Discover Financial Services /quotes/comstock/13*!dfs/quotes/nls/dfs (DFS 15.32, +0.19, +1.26%) shares advanced 5.9%, with the credit card company's market valuation up 61% so far this year.

East West Bancorp Inc. /quotes/comstock/15*!ewbc/quotes/nls/ewbc (EWBC 14.10, +0.25, +1.81%) shares soared 55% to $13,41 after it said it would buy the banking operations of United Commercial Bank of San Francisco, shut down by federal regulators Friday. See full story.

Enzon Pharmaceuticals Inc. /quotes/comstock/15*!enzn/quotes/nls/enzn (ENZN 9.66, -0.51, -5.02%) shares advanced 9.5% after the company said it would sell most of its business to concentrate on experimental cancer treatments. See Market Pulse.

Fluor Corp. /quotes/comstock/13*!flr/quotes/nls/flr (FLR 42.61, -0.46, -1.07%) rose 5.8%, with shares of the engineering and project management company climbing ahead of its earnings report after the close.

Host Hotels & Resorts Inc. /quotes/comstock/13*!hst/quotes/nls/hst (HST 10.11, +0.05, +0.50%) shares surged 8.1%.

JDS Uniphase Corp. /quotes/comstock/15*!jdsu/quotes/nls/jdsu (JDSU 7.33, -0.10, -1.35%) shares rallied 7.4%.

MBIA Inc. /quotes/comstock/13*!mbi/quotes/nls/mbi (MBI 3.41, +0.01, +0.29%) shares rose more than 10%. Read Financial Stocks.

Micron Technology Inc. /quotes/comstock/13*!mu/quotes/nls/mu (MU 7.44, +0.14, +1.92%) shares rose 6.1% amid a rally among providers of semiconductor chips. Read Tech Stocks.

New York Times Co. /quotes/comstock/13*!nyt/quotes/nls/nyt (NYT 8.42, -0.34, -3.88%) shares gained 5.6%.