Western Refining, Inc. (WNR), Intuitive Surgical, Inc. (ISRG): Four Analyst Upgrades that I Would Not Chase

An analyst’s call can be a major swing in momentum for a stock, creating a domino effect of revised outlooks and either buying or selling. Here are four stocks that traded with excessive volatility last Friday thanks to the notes issued by analysts; these are all calls worth noting that might not result in long-term gains.

Western Refining

Much like other refiners, shares of Western Refining, Inc. (NYSE:WNR) have continued to tick higher and created a new 52-week high last Friday thanks to Barclays. The stock ticked higher by 5.1% after Barclays’ $47 price target and its Overweight rating. The reason for the firm’s bullish initiation of coverage is due to the continued distinction between oil and gasoline.

Within in the industry, stocks are benefiting from a continued trend of oil prices dropping, therefore lowering the costs for refiners, and gasoline prices rising, therefore increasing the revenue for refiners. Obviously, if costs decrease and revenue increases then a company’s margins will improve.

As a result, Barclays believes Western is a Buy. The big question is regarding sustainability. Despite these factors the company did just post a mixed earnings report. In my opinion, sooner or later the price between oil and gasoline will stabilize, which could create selling pressure among refiners. Therefore, I wouldn’t buy at these levels.

Nanosphere

Canaccord issued a 150% upside price target for Nanosphere, a company that lost 30% of its value in February after issuing weak guidance. Therefore, with the stock being oversold, the bullish call created gains of 13.85% on Friday. The firm believes that Nanosphere is poised to capture a large piece of the molecular diagnostics business after it shifted its focus to blood stream infections.

Last June the company earned an FDA approval for Gran-Positive Blood Culture Nucleic Acid, and has since become an early leader in the detection of sepsis. My problem is that the company re-shifted its focus to blood stream infections last year and just issued guidance that was way below expectations.

I agree that it is a large-potential market, however in this case, I will look for guidance from the company rather than from the analyst, and guidance from the company drove the stock 30% lower last month.

Intuitive Surgical

Last week was volatile for shares of Intuitive Surgical, Inc. (NASDAQ:ISRG) after news that the company is being probed by U.S. regulators regarding the safety of its robots. Reportedly, regulators have contacted a number of high-profile hospitals to discuss any potential problems.

But analysts from Cantor Fitzgerald, Janney, and Blair all came to the company’s defense. Cantor said the reaction was “overdone” and then upgraded shares to Buy. Other analysts with Buy ratings report that the probe is not about safety but rather surveillance and believe that shares should be bought.

In my opinion, the stock is not cheap, and although this “probe” could be precautionary, I would still wait due to the stock being near the top of its range.