Marvell Technology, Dell among big movers

NYSE

J. Crew Group Inc., down $9.64 at $37.27

Two analysts downgraded shares of the preppy retailer, after it cut its full-year profit outlook and forecast second-quarter earnings below what analysts expected.

Tiffany & Co., up $1.29 at $49.03

Earnings were better than expected for the jewelry retailer because of growth in the Asia-Pacific and European markets.

US Airways Group Inc., down 36 cents at $3.96

For the time being, chief executives for the carrier and UAL Corp.'s United Airlines called off efforts to combine and create the world's biggest airline.

Heico Corp., up $4.08 at $50.73

The aerospace and defense company raised its fiscal 2008 profit outlook after reporting its fiscal second-quarter profit rose 27 percent.