Analysts at Wells Fargo downgraded Groupon (NASDAQ:

) from “outperform” to “market perform.” The target price range for Groupon has been lowered from $6-$7 to $5-$6. Groupon's shares closed at $5.98 yesterday. Analysts at Jefferies downgraded OGE Energy (NYSE:

) from “buy” to “hold.” The target price for OGE Energy has been lowered from $63.50 to $59. OGE Energy's shares closed at $58.23 yesterday. Analysts at UBS downgraded Whiting Petroleum (NYSE:

) from “buy” to “neutral.” The target price for Whiting Petroleum has been lowered from $53 to $51. Whiting Petroleum's shares closed at $49.16 yesterday. Morgan Stanley downgraded Saks (NYSE:

) from “equal weight” to “underweight.” The target price for Saks is set to $10. Saks' shares closed at $11.35 yesterday.