Analysts' Upgrades, Downgrades: Lowe's

CHANGE IN RATINGS

Aecom Technology (ACM Quote) downgraded at Morgan Stanley to Equal-weight. Stock has more than doubled from its October lows, and the company is already pricing in some expected near-term catalysts.

AK Steel (AKS Quote) upgraded at Goldman Sachs to Buy from Neutral based on high sensitivity to rising steel prices. Note that electrical steel segment should get a boost from global stimulus packages, especially in China. Price target raised to $15 from $9.

Autozone (AZO Quote) downgraded at BofA/Merrill from Buy to Neutral. Valuation call, as the stock is up 28% since late October. Expect near-term comp sales to remain flat. ...