Analysts at Canaccord downgraded Teva Pharmaceutical Industries (NYSE:

) from “buy” to “hold.” The target price for Teva has been raised from $50 to $45. Teva's shares closed at $37.96 yesterday. Analysts at FBR Capital downgraded Riverbed Technology (NASDAQ:

) from “outperform” to “market perform.” The target price for Riverbed has been lowered from $28 to $20. Riverbed's shares closed at $20.10 yesterday. Analysts at Roth Capital downgraded Skullcandy (NASDAQ:

) from “buy” to “neutral.” The target price for Skullcandy is set to $7. Skullcandy's shares closed at $6.61 yesterday. CRT Capital downgraded Alpha Natural Resources (NYSE:

) from “buy” to “fair value.” The target price for Alpha Natural is set to $8. Alpha Natural's shares closed at $8.51 yesterday.