Top Analyst Upgrades and Downgrades (ALL, AOL, MT, DD, DANG, ESRX, HK, HCA, ONE, HUM, STEC, TWC, THS, WLP, WPRT)

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

Allstate Corp. (NYSE: ALL) reiterated Buy but raised target to $46 at Argus, and named as Bull of the Day at Zacks.

AOL Inc. (NYSE: AOL) cut to Underperform at CLSA.

ArcelorMittal (NYSE: MT) raised to Buy at BofA/ML, raised to Buy at Soc-Gen and cut to Sell from Neutral at UBS.

E.I. DuPont de Nemours & Co. (NYSE: DD), or DuPont, cut to Underperform as Bear of the Day at Zacks.

E-Commerce China Dangdang Inc. (NYSE: DANG) started as Neutral at JPMorgan.

Express Scripts Holding Co. (NASDAQ: ESRX) maintained Buy but removed from Conviction Buy List at Goldman Sachs.

Halcon Resources Corp. (NYSE: HK) started as Buy at SunTrust Robinson Humphrey.

HCA Holdings Inc. (NYSE: HCA) raised to Buy at Goldman Sachs.

Higher One Holdings. Inc. (NYSE: ONE) cut to Neutral at Credit Suisse.

Humana Inc. (NYSE: HUM) cut to Sell from Neutral at Goldman Sachs and cut to Neutral at BofA/ML.

STEC Inc. (NASDAQ: STEC) cut to Neutral at Lazard.

Time Warner Cable Inc. (NYSE: TWC) reiterated Buy with $100 target at Argus.

TreeHouse Foods Inc. (NYSE: THS) cut to Underperform at Credit Suisse.

WellPoint Inc. (NYSE: WLP) cut to Underperform at BofA/ML.

Westport Innovations Inc. (NASDAQ: WPRT) started as Sell at Goldman Sachs.

As far as the stocks and sectors that will be perceived winners or losers based on the election, we have our full list here.