Hibbett Sports ( HIBB) downgraded at CIBC from Outperform to Sector Perform. Estimates also cut, as same-store sales and the EBIT margin are expected to shrink over the coming quarters. Nova Chemicals ( NCX) upgraded at UBS to Buy rating from Neutral. Price target holds at $41 and FY 2008 eps estimates dip to $3.20 from $3.75. Office Depot ( ODP) downgraded at Bear to Peer Perform. Turnaround initiatives could disrupt near-term sales. Stock is not at a trough valuation, and the company lacks potential catalysts. Office Depot numbers slashed at Jefferies. Price target drops to $18.50 from $23 and FY 2008 eps estimates lowered to $1.53 from $2.10. Reiterates Hold rating. Orient-Express ( OEH) upgraded at UBS to Buy rating from Neutral. Price target and FY 2008 eps estimates hold at $61.50 and $1.67, respectively. Pinnacle Entertainment ( PNK) coverage initiated at Goldman with a Buy rating. See solid returns from casino business that is less capital-intensive. Note December St. Louis opening and February referendum on Baton Rouge opportunity. Price target at $35. Wyndham Worldwide ( WYN) upgraded at Weisel from Market-weight to Overweight. Company has a strong balance sheet and decent growth prospects. Timeshare business also not yet priced into the stock.