Tuesday's Upgrades and Downgrades

UPGRADES

Ryland Group RYL Citigroup Hold » Buy
Pulte Homes PHM Citigroup Hold » Buy
Lennar LEN Citigroup Hold » Buy
DR Horton DHI Citigroup Hold » Buy
Centex CTX Citigroup Hold » Buy
First Mariner Banc FMAR Ferris Baker Watts Neutral » Buy
Polycom PLCM Wedbush Morgan Hold » Buy
Kellwood KWD Lazard Capital Hold » Buy
Chemtura CEM KeyBanc Capital Mkts Hold » Buy
Switch & Data SDXC CIBC Wrld Mkts Sector Perform » Sector Outperform
SEI Investments SEIC Keefe Bruyette Mkt Perform » Outperform
Alvarion ALVR Susquehanna Financial Neutral » Positive
Intersil ISIL Lehman Brothers Underweight » Equal-weight
Systems Xcellence SXCI UBS Neutral » Buy
Texas Industries TXI Davenport Neutral » Buy
Kilroy Realty KRC Citigroup Hold » Buy
CME Group CME Wachovia Mkt Perform » Outperform
Nutrisystem NTRI Broadpoint Capital Buy » Strong Buy




DOWNGRADES

Navteq NVT Janco Partners Buy » Mkt Perform
MDC Holdings MDC Citigroup Buy » Hold
Meritage MTH Citigroup Buy » Hold
Canadian Natl Rail CNI BMO Capital Markets Outperform » Market Perform
Landstar System LSTR KeyBanc Capital Mkts Buy » Hold
Celadon Group CLDN KeyBanc Capital Mkts Buy » Hold
Amgen AMGN Stifel Nicolaus Buy » Hold
ADVENTRX Pharma ANX Dawson James Speculative Buy » Sell
National City NCC Bear Stearns Outperform » Underperform
Comcast CMCSA Soleil Buy » Hold
NMT Medical NMTI Collins Stewart Buy » Market Perform
Illinois Tool ITW Bear Stearns Outperform » Peer Perform
CGI Group GIB RBC Capital Mkts Outperform » Sector Perform
Citrix Systems CTXS Banc of America Sec Buy » Neutral
Research In Motion RIMM RBC Capital Mkts Top Pick » Outperform
Par Pharmaceutical PRX Friedman Billings Mkt Perform » Underperform
NetLogic NETL Lehman Brothers Overweight » Equal-weight
Marvell MRVL Lehman Brothers Overweight » Equal-weight
Integrated Device IDTI Lehman Brothers Overweight » Equal-weight
3Com COMS UBS Buy » Neutral