NEW YORK (TheStreet) -- RATINGS CHANGES

American Public Education(APEI) - Get Report was downgraded to hold at TheStreet Ratings.

CDI (CDI) was upgraded to buy at TheStreet Ratings.

Groupon(GRPN) - Get Report was upgraded at RBC Capital to sector perform from underperform. Twelve-month price target is $6. Risk/reward is more even at current levels, RBC Capital said.

Northrop Grumman(NOC) - Get Report was upgraded at RBC Capital to outperform from sector perform. Twelve-month price target is $148. Worst of the budget problems appear to be behind the company, which can expand margins, RBC Capital said.

Progressive(PGR) - Get Report was upgraded at Goldman Sachs to buy. Personal insurers should outperform in the near term, Goldman said. Twelve-month price target is $28.

PulteGroup(PHM) - Get Report was downgraded at FBR Capital Markets to market perform from outperform. Valuation call, based on a $22 price target, FBR Capital Markets said.

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This article was written by a staff member of TheStreet.