Top Analyst Upgrades and Downgrades (CECO, GLW, DMD, DLTR, ETN, HLF, IACI, LDK, NS, ZEUS, PTNR, RENN, SPW, TEVA)

These are some of the top analyst upgrades, downgrades and initiations seen in Wall St. research calls this Tuesday.

Career Education Corp. (NASDAQ: CECO) cut to Market Perform at Wells Fargo.

Corning Inc. (NYSE: GLW) started as Outperform at Bernstein.

Demand Media Inc. (NYSE: DMD) cut to Sell at Goldman Sachs.

Dollar Tree Inc. (NASDAQ: DLTR) raised to Equal Weight at Morgan Stanley.

Eaton Corp. (NYSE: ETN) started as Buy at Citigroup.

Herbalife Ltd. (NYSE: HLF) maintained Buy but cut target to $56 from $76 at Argus.

IAC/InteractiveCorp (NASDAQ: IACI) cut to Sell at Goldman Sachs.

LDK Solar Co. Ltd. (NYSE: LDK) reiterated Sell at Argus.

NuStar Energy L.P. (NYSE: NS) cut to Underperform at Zacks (late-Monday call).

Olympic Steel Inc. (NASDAQ: ZEUS) cut to Hold at Jefferies.

Partner Communications Co. Ltd. (NASDAQ: PTNR) raised to Buy at BofA/ML.

Renren Inc. (NYSE: RENN) raised to Hold at Deutsche Bank.

SPX Corp. (NYSE: SPW) started as Neutral at Credit Suisse.

Teva Pharmaceutical Industries Ltd. (NYSE: TEVA) maintained Buy with $48 target at Argus.

Want to see 2013 S&P 500 targets? Here are the price targets for up to more than 20% total market upside with projections from everyone.

JON C. OGG