ACADIA Pharmaceuticals Inc. (NASDAQ: ACAD) was raised to Overweight from Equal Weight at Piper Jaffray, but the firm’s $48 price target was maintained.

Aflac Inc. (NYSE: AFL) was raised to Outperform from Market Perform with a price target of $68 (versus a $56.92 close) at Keefe Bruyette & Woods.

BHP Billiton Ltd. (NYSE: BHP) was raised to Neutral from Underperform at BNP Paribas.

Boston Scientific Corp. (NYSE: BSX) was raised to Buy from Neutral with a $20 price target (versus a $16.37 close) at Goldman Sachs.

CNOOC Ltd. (NYSE: CEO) was raised to Outperform from Neutral at Credit Suisse.

C.R. Bard Inc. (NYSE: BCR) was raised to Buy from Neutral with a $220 price target (versus a $189.44 close) at Goldman Sachs.

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CSX Corp. (NYSE: CSX) was raised to Buy from Hold with a $35 price target (versus a $26.37 close) at Stifel Nicolaus.

ING Groep N.V. (NYSE: ING) was raised to Buy from Hold at Deutsche Bank.

Puma Biotechnology Inc. (NASDAQ: PBYI) was started as Overweight with a $122 price target at JPMorgan.

Sabra Healthcare REIT Inc. (NASDAQ: SBRA) was raised to Market Perform from Market Underperform at JMP Securities.

Shenandoah Telecommunications Co. (NASDAQ: SHEN) was raised to Outperform from Market Perform with a $45 price target (versus a $39.38 close) at Raymond James.

SunTrust Banks Inc. (NYSE: STI) was raised to Buy from Hold with a $46 price target at Evercore ISI. This was also just featured as a big bank back under book value again due to the pullback.

Teladoc Inc. (NYSE: TDOC) was started as Outperform and with a $35 price target (versus a $25.28 close) at Leerink.

ALSO READ: 7 Bull Market Leaders to Buy After the Sell-Off

From a Wells Fargo Advisors strategist: “It may be difficult for investors to step in and buy equities when there appears to be so much uncertainty, but the current pullback represents a buying opportunity in our opinion.”

If you missed Wednesday’s top analyst upgrades and downgrades, they include Amazon.com, Best Buy, Google, IBM, Marathon Petroleum, Nike, WisdomTree Investments and over a dozen more. In case you missed Tuesday’s top analyst upgrades and downgrades, they were in shares of Apple, Bank of America, Canadian Solar, Garmin, Regions Financial, Euronav and over a dozen more.