Tuesday's Analysts' Upgrades and Downgrades

Marvell Technology (MRVL Quote) downgraded at UBS to Reduce rating from Buy. Price target drops to $18.50 from $28 and 2007 EPS estimates lowered to $0.41 from $0.53.

PPG Industries (PPG Quote) upgraded at Goldman Sachs to Buy from Neutral based on management's commitment to consider alternatives for its low-growth, low-margin auto glass business and newfound reporting transparency of its better-performing businesses. Price target at $82.

Shuffle Master (SHFL Quote) downgraded at Jefferies to Hold rating from Buy. Price target falls to $19 from $26 and 2007 EPS estimates lowered to $0.50 from $0.77.

SanDisk (SNDK Quote) upgraded at UBS to Buy rating from Neutral. Price target jumps to $53 from $43 and CY2008 EPS estimates hold at $2.12.