Tesla Motors Inc. (NASDAQ:TSLA) and Groupon Inc. (NASDAQ:GRPN) were among big movers in Tuesday intraday trading session after receiving impressive stock ratings from research firms, according to the Fast Money Crew on CNBC. Research firm, Stifel Nicolaus, has set a ‘Buy’ rating on Tesla, while RBC capital maintained a ‘Sector Perform’ rating for Groupon.

Tesla Motors, is TSLA a good stock to buy, Stifel Nicolaus, upgrade,

Tesla Motors Inc. (NASDAQ:TSLA) hit a new all-time high of $284.89 after being upgraded by an analyst at Stifel Nicolaus with the firm currently maintaining a share price target of $400 on the stock. Improvement in production levels remains important for Tesla with optimism that the company can be able to attain production levels of 1000 cars per-week by the end of the year.

“[…] Stifel upgrade to $400 says they think that not only are they disruptive with great technology, but they are also assuming no competition. They are excited that they see advanced development in the production, which is really what it is about, these guys have to hit production levels. I don’t think they will,” said CNBC’s Timothy Seymour.

Tesla Motors Inc. (NASDAQ:TSLA) continues to surge on the market on the fact that it faces minimal competition in the electric car segment as there are only few companies with similar products. There is also optimism that the company’s vehicles will become more popular with the construction of the proposed battery factory as well as the construction of more charging stations.

Online daily deals marketplace Groupon Inc. (NASDAQ:GRPN) was also up in the market after being upgraded by RBC Capital, the target price being also raised to $6.  RBC capital believes that the stock could be set to make a move for the upside having improved a number of operating initiatives. Groupon Inc. (NASDAQ:GRPN) is also reported to be aligning its business to enjoy the benefits of being easily accessible through mobile devices

“[…] Mobile adoption is going well. I don’t buy that argument, but it is probably not a bad speculative name to have in your book if they get a few things right I would keep a $6 stock […],” said Dan Nathan.

JAT Capital Management, led by John Thaler, holds 948,778 shares of  Tesla Motors Inc. (NASDAQ:TSLA) with a reported value $227.76 million.

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