Stocks were indicated lower on Tuesday morning ahead of a Fed Chair Janet Yellen’s expected verbiage on interest rates. Last week broke a five-week period of gains, and now investors are caught wondering if they should be buying the dips or selling into the rallies.

24/7 Wall St. reviews dozens of analyst research reports each morning of the week. The goal is to find new investing and trading ideas for our readers. Some of the daily analyst reports cover stocks to buy, and others cover stocks to sell or avoid.

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

Ambarella Inc. (NASDAQ: AMBA) was raised to Overweight from Equal Weight with a $55 price target (versus a $40.71 prior close) at Morgan Stanley. It has a consensus analyst price target of $57.55 and a 52-week trading range of $33.39 to $129.19.

Delta Air Lines Inc. (NYSE: DAL) was started as Overweight at Stephens. Shares closed at $48.20, with a consensus price target of $65.08 and a 52-week range of $34.61 to $52.77. United Continental and American were started as Equal Weight in the call as well.

eBay Inc. (NASDAQ: EBAY) was downgraded to Underweight from Equal Weight with a $25 price target (versus a $24.12 close) at Barclays. The consensus price target is $27.97. The 52-week range is $21.52 to $29.83.

LinkedIn Corp. (NYSE: LNKD) was downgraded to Equal Weight from Overweight with a $130 price target (versus a $109.12 close) at Barclays. Its consensus analyst price target is $175.98 and it has a 52-week range of $98.25 to $266.53.

Micron Technology Inc. (NASDAQ: MU) was downgraded to Underperform from Hold at Needham. The consensus price target is $15.57, while the 52-week range is $9.31 to $29.78.

Relypsa Inc. (NASDAQ: RLYP) was started as Buy with a $26 price target (versus a $12.95 close) at Brean Capital. Relypsa has a consensus analyst target of $41 and a 52-week range of $10.26 to $37.95.

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Other key analyst upgrades and downgrades were seen in the following:
Bancolombia S.A. (NYSE: CIB) was downgraded to Neutral from Buy at Goldman Sachs.

BorgWarner Inc. (NYSE: BWA) was downgraded to Neutral from Buy at Citigroup.

Grupo Aval Acciones Y Valores, S.A. (NYSE: AVAL) was downgraded to Neutral from Buy at Goldman Sachs.

Host Hotels & Resorts Inc. (NYSE: HST) was started as Buy with a $19 price target (versus a $16.34 close) at Stifel.

Itau Unibanco Holding S.A. (NYSE: ITUB) was downgraded to Sell from Neutral at Goldman Sachs.

Legg Mason Inc. (NYSE: LM) was reiterated as Buy and the price target was raised from $37 to $42 at Jefferies.

Limelight Networks Inc. (NASDAQ: LLNW) was started as Market Outperform with a $2.50 price target at JMP Securities.

Lions Gate Entertainment Corp. (NYSE: LGF) was started as Overweight at Pacific Crest.

Lexington Realty Trust (NYSE: LXP) was downgraded to Underperform from Neutral at Bank of America Merrill Lynch.

Monro Muffler Brake Inc. (NASDAQ: MNRO) was started as Outperform with an $80 price target (versus a $70.79 close) at Oppenheimer.

NiSource Inc. (NYSE: NI) was downgraded to Neutral from Overweight with a $24 price target (versus a $22.92 close) at JPMorgan.

Old National Bancorp. (NYSE: ONB) was raised to Outperform from Market Perform with a $14 price target (versus an $11.87 close) at Raymond James.

Polaris Industries Inc. (NYSE: PII) was downgraded to Sector Perform from Outperform with a price target of $93.00 (versus a $98.25 close) at RBC Capital Markets.

Six Flags Entertainment Corp. (NYSE: SIX) was started as Neutral at Sterne Agee CRT.

Skyworks Solutions Inc. (NASDAQ: SWKS) was downgraded to Neutral from Buy at Citigroup.

Universal Health Services Inc. (NYSE: UHS) was raised to Outperform from Market Perform at Wells Fargo.

If you missed Monday’s top analyst upgrades and downgrades, they included Berkshire Hathaway, CarMax, Noble, Phillips 66, Portola Pharmaceuticals, Qualcomm and over a dozen more companies.

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