Cabela's ( CAB) downgraded at Baird from Outperform to Neutral. $24 price target. Company posted poor third quarter results and lowered guidance. Davita ( DVA) downgraded at Oppenheimer from Buy to Neutral. Stock already pricing in potential favorable dialysis language in a year-end Medicare bill. FirstFed Financial ( FED) downgraded at Friedman, Billings Ramsey from Market Perform to Underperform. $35 price target. Credit trends are eroding much faster in the weakening housing market. Hansen Natural ( HANS) downgraded at JP Morgan from Overweight to Neutral. Valuation call. Stock has had a large run up, gaining 104% over the past year. Harmonic ( HLIT) upgraded at Friedman, Billings Ramsey from Market Perform to Outperform. $14.50 price target. Expect more spending on HD video over the coming quarters. Idex ( IEX) upgraded at Friedman, Billings Ramsey to Outperform. Company posted a strong quarter, and the fundamental outlook remains strong into 2008. $41 price target. J Crew ( JCG) upgraded at CIBC from Sector Perform to Outperform. $50 price target. Company stands out in a bleak adult apparel business. MBIA ( MBI) downgraded at Morgan Stanley to Underweight. Stock not expected to gain as much as its peers over the next 12 to 18 months. Ambac or Primus offer better upside potential at current levels. Old Dominion ( ODFL) upgraded at Bear Stearns from Underperform to Peer Perform. Valuation call, as the stock is down 27% over the past three months. Estimates cut to reflect increased competition, but this is already reflected in the stock.