United Technologies downgraded; Twitter raised to "buy"; Planet Fitness' strong start

Time for your daily dose of trending tickers, the stocks you're following based on your Yahoo Finance ticker searches.

United Technologies

A fresh round of calls on Wall Street moved stocks like United Technologies (UTX). Shares fell after Barclays dropped its rating to "equal weight" from "overweight" The price target was also cut by $20 to $100 a share, that's still higher than where the stock is currently trading. China was one of the major reasons behind Barclay's revision. Specifically, United Technologies' Otis elevator unit, which is facing growing pressure in China.

Planet Fitness 

Strong coverage starts gave Planet Fitness (PLNT) a boost. Now that the quiet period for the stock is over, a slew of firms issued positive calls for the company including Jefferies, which gave it a "buy" rating, with the highest price target on the Street at $25 a share. That's a potential upside of almost 50% from the last close. The firm back its bullish call saying the company is well-managed and it would be very difficult for competitors to copy Planet Fitness' business model.

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Twitter 

Twitter (TWTR) got a nice pop after an upgrade. The microblogging site was raised to a "buy" from "neutral" at SunTrust with a price target of $38 a share. That's a whopping 40% upside potential from the last closing price. The firm cited a series of possible positive catalysts and said the valuation looked attractive after "sentiment has washed out." The stock has tumbled 27% over the past three months.