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

AmBev (NYSE: ABV) named Bear of the Day at Zacks.

Baker Hughes Inc. (NYSE: BHI) started as Neutral at Credit Suisse.

Citigroup Inc. (NYSE: C) raised to Strong Buy at Jefferies.

Halliburton Co. (NYSE: HAL) started as Outperform at Credit Suisse.

Heartland Financial USA Inc. (NASDAQ: HTLF) named Value stock of the day at Zacks.

Home Loan Servicing Solutions Ltd. (NASDAQ: HLSS) started as Buy with $21 price target at BofA/ML.

Kroger Co. (NYSE: KR) raised to Buy at Jefferies.

Pinnacle West Capital Corp. (NYSE: PNW) raised to Outperform as Bull of the Day at Zacks.

Riverbed Technology Inc. (NASDAQ: RVBD) cut to Neutral at Citigroup.

Schlumberger Ltd. (NYSE: SLB) started as Neutral at Credit Suisse.

Sprint Nextel Corp. (NYSE: S) raised to Market Perform at Bernstein and raised to Neutral at R.W. Baird.

Teva Pharmaceutical Industries Ltd. (NYSE: TEVA) maintained Buy but lowered target to $50 at Canaccord Genuity.

Watson Pharmaceuticals Inc. (NYSE: WPI) reiterated Buy with $100 target at Canaccord Genuity.

Weatherford International Ltd. (NYSE: WFT) started as Neutral at Credit Suisse.

JON C. OGG