Investors get to see many upgrades and positive research calls from Wall Street firms, but it is very frequent that they do not get to see when analysts downgrade stocks to sell or tell their clients to avoid issues. 24/7 Wall St. reviews many fresh research calls each and every day to find great ideas from value stocks to growth stocks to dividend stocks, and we have broken out the negative analyst calls today. These are this Thursday’s top analyst downgrades and cautious research notes from Wall Street.

AngloGold Ashanti Ltd. (NYSE: AU) was downgraded to Sell from Hold at Societe Generale.

Banco Santander S.A. (NYSE: SAN) was downgraded to Underweight from Neutral at J.P. Morgan.

DreamWorks Animation SKG Inc. (NASDAQ: DWA) was started with an Underperform rating.

Rangold Resources Ltd. (NASDAQ: GOLD) was downgraded to Hold from Buy at Societe General.

Republic Services Inc. (NYSE: RSG) was removed from the Conviction Buy List and downgraded to Neutral at Goldman Sachs.

Royal Bank of Scotland Group PLC (NYSE: RBS) was downgraded to Sell from Hold by Deutsche Bank.

Safeway Inc. (NYSE: SWY) was downgraded to Neutral from Buy at Citigroup.

Waste Management Inc. (NYSE: WM) was downgraded to Neutral from Buy at Goldman Sachs.

Here is housing sector piece over whether rising rates will harm the home builders.

Here are the top upgrades and stocks to buy this morning.