Investors and traders are usually on the lookout for new research ideas that will generate higher income or more profits. 24/7 Wall St. reviews many analyst research calls from Wall Street and from boutique firms to find great ideas in value stocks, growth stocks and dividend stocks. Some are stocks to buy, while some ideas are even stocks to sell. These are some of the top analyst upgrades, downgrades and initiations seen from select Wall Street research calls this Tuesday.

Accenture PLC (NYSE: ACN) was downgraded to Hold from Buy at Argus. The downgrade is “amid weakening signs in its consulting business and extended conversions of bookings into revenue.”

Blackhawk Network Holdings Inc. (NASDAQ: HAWK) was started as Buy with $28 price target by Argus, as the recent pullback created a favorable entry point.

Cheniere Energy Inc. (NYSEMKT: LNG) and Cheniere Energy Partners L.P. (NYSEMKT: CQP) were both started as Outperform at Credit Suisse, with respective price targets of $38 and $31.

Groupon Inc. (NASDAQ: GRPN) was started as Buy with an $11 price target at Wunderlich.

J.P. Morgan Chase & Co. (NYSE: JPM) was raised to Strong Buy from Outperform at Raymond James.

Linn Energy LLC (NASDAQ: LINE) and Linn Co. LLC (NASDAQ: LNCO) were both downgraded to Neutral from Overweight by J.P. Morgan.

Ryder System Inc. (NYSE: R) was started as Buy with a $72 price target at Wunderlich.

Seagate Technology PLC (NASDAQ: STX) was raised to Equal Weight from Underweight at Barclays.

Transocean Ltd. (NYSE: RIG) was downgraded to Neutral from Buy at Citigroup.

Wells Fargo & Co. (NYSE: WFC) was downgraded to Market Perform from Outperform at Keefe Bruyette & Woods.

Jefferies gave a list of transportation stocks to buy for a strong second half of 2013.

While this is not an upgrade or downgrade and outside of the typical research calls, Zynga Inc. (NASDAQ: ZNGA) was reiterated Neutral after new CEO news by Sterne Agee.