Stocks were indicated lower on Friday the 13th, after a volatile Thursday. Investors have proven that they are still looking for opportunities and hidden gems, and so far they are more than willing to buy the big market dips.

24/7 Wall St. reviews dozens of analyst research reports each morning of the week. Our goal is to find new investing and trading ideas. Some of these analyst reports cover stocks to buy, and other reports feature stocks to sell or to avoid.

These are the top analyst upgrades, downgrades and initiations seen on Friday morning:

Allergan PLC (NYSE: AGN) was reiterated as Buy at Goldman Sachs, but the firm added Allergan to the prized Conviction Buy list. The stock closed most recently at $216.02. Allergan has a consensus analyst price target of $293.75 and a 52-week trading range of $195.50 to $340.34.

Lockheed Martin Corp. (NYSE: LMT) was downgraded to Hold from Buy at Stifel. Its shares closed at $244.94, and its consensus analyst target is $242.44. The 52-week range is $181.91 to $245.37.

Mylan N.V. (NASDAQ: MYL) was maintained as Buy at Goldman Sachs, but it was removed from the firm’s prized Conviction Buy list. Shares closed at $38.62. The stock has a consensus price target of $59.56 and a 52-week range of $37.59 to $74.66.

Nordstrom Inc. (NYSE: JWN) was last seen trading down 16% at $37.80 after a bad earnings miss. Nordstrom was maintained as Neutral at Credit Suisse, but the firm lowered its price target to $40 from $55 (versus a $45.23 prior close). The stock is hitting new 52-week lows, even after falling to a 52-week low of $43.84 the prior day.

Petroleo Brasileiro S.A. (NYSE: PBR), or Petrobras, was maintained as Neutral at Merrill Lynch with a $7.50 price objective (versus a $7.35 close). Despite EBITDA being helped by better refining results and despite the potential sale of pipelines being near, the firm thinks that Petrobras’s underlying risks remain high. The consensus price target is $4.88, and the 52-week range is $2.71 to $10.46.

NVIDIA Corp. (NASDAQ: NVDA) was reiterated as Buy at Jefferies, but the firm raised its target price to $45 from $42 (versus a $35.57 close). Jefferies said that its four secular trends thesis is just starting to play out and that NVIDIA remains one of its top picks. Shares were indicated up 8% at $38.45. The consensus price target is $37.08, and the stock has a 52-week range of $19.09 to $37.46.

Western Digital Corp. (NASDAQ: WDC) was downgraded to Underperform from Buy and the price objective was slashed to $30 from $61 (versus a $36.36 close) at Merrill Lynch. The call cites even prolonged near-term earnings risks, which outweigh longer term opportunity now. The stock had a consensus target of $61.75 before this call, and its 52-week range is $35.69 to $99.76.

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Here are many more of this Thursday’s analyst upgrades, downgrades and initiations seen from Wall Street research calls:
AerCap Holdings N.V. (NYSE: AER) was downgraded to Market Perform from Outperform and the price target was cut to $43 from $50 (versus a $36.85 close) at FBR Capital Markets.

AppFolio Inc. (NASDAQ: APPF) was downgraded to Equal Weight from Overweight and the price target was cut to $15 from $18 (versus a $12.52 close) at Morgan Stanley.

Arista Networks Inc. (NYSE: ANET) was started with a Neutral rating and was assigned a $67 price target (versus a $66.57 close) at JPMorgan.

Callaway Golf Co. (NYSE: ELY) was raised to Buy from Neutral and the price target was raised to $13 from $10 (versus a $9.25 close) at SunTrust Robinson Humphrey.

Comerica Inc. (NYSE: CMA) was downgraded to Underperform from Market Perform at Wells Fargo. Wasn’t this a hopeful buyout candidate just last month?

CyberArk Software Ltd. (NASDAQ: CYBR) was raised to Buy from Neutral and the price objective was raised from $46 to $50 (versus a $40.10 close) at Merrill Lynch. The firm said that CyberArk had solid execution and there is a large opportunity with new and existing customers.

Deckers Outdoor Corp. (NYSE: DECK) was downgraded to Underweight from Hold at BB&T Capital Markets.

Johnson & Johnson (NYSE: JNJ) was downgraded to Neutral from Buy at BTIG.

Pacific Continental Corp. (NASDAQ: PCBK) was raised to Outperform with an $18 price target (versus $16.16 close) at Raymond James.

Paratek Pharmaceuticals Inc. (NASDAQ: PRTK) was started as Outperform with a $30 price target (versus a $12.68 close) at Robert W. Baird. This is after news from this week that it received FDA affirmation for the design of its proposed Omadacycline oral-only skin infection Phase 3 trial study.

Stantec Inc. (NYSE: STN) was raised to Outperform from Market Perform at Raymond James.

Tesaro Inc. (NASDAQ: TSRO) was started as Outperform with a $56 price target (versus a $41.09 close) at Credit Suisse. The firm said that it has an underappreciated top emerging cancer pipeline.

Textura Corp. (NYSE: TXTR) was downgraded to Market Perform from Outperform at JMP Securities.

UBS A.G. (NYSE: UBS) was downgraded to Hold from Buy at Societe Generale.

Thursday’s top analyst upgrades and downgrades included Baidu, Boeing, Coeur Mining, Flextronics, NXP Semiconductors, Walt Disney, WebMD and over a dozen more.

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