Equities Research Analysts’ upgrades for Tuesday, August 22nd:

AK Steel Holding (NYSE:AKS) was upgraded by analysts at ValuEngine from a buy rating to a strong-buy rating.

Appliance Recycling Centers of America (NASDAQ:ARCI) was upgraded by analysts at ValuEngine from a sell rating to a hold rating.

Cambrex Corporation (NYSE:CBM) was upgraded by analysts at ValuEngine from a hold rating to a buy rating.

Calumet Specialty Products Partners, L.P. (NASDAQ:CLMT) was upgraded by analysts at ValuEngine from a sell rating to a hold rating.

Enservco Corp (NYSEMKT:ENSV) was upgraded by analysts at ValuEngine from a strong sell rating to a sell rating.

First Reliance Bancshares (OTCMKTSBB:FSRL) was upgraded by analysts at ValuEngine from a hold rating to a buy rating.

General Moly (NYSEMKT:GMO) (TSE:GMO) was upgraded by analysts at ValuEngine from a sell rating to a hold rating.

HealthWarehouse.com (OTCMKTS:HEWA) was upgraded by analysts at ValuEngine from a sell rating to a hold rating.

Polydex Pharmaceuticals (OTCMKTS:POLXF) was upgraded by analysts at ValuEngine from a sell rating to a hold rating.

Univar (NYSE:UNVR) was upgraded by analysts at BidaskClub from a strong sell rating to a sell rating.

Zogenix (NASDAQ:ZGNX) was upgraded by analysts at ValuEngine from a sell rating to a hold rating.