NEW YORK (TheStreet) -- Shares of Twitter (TWTR) - Get Report are flat at $14.11 early Monday morning as its price target was reduced to $14 from $18 and its "neutral" rating maintained at MKM Partners.

"While we still see mass market potential in the Twitter service, significant execution risk looms large," MKM analysts said in an investor note.

Twitter's inability to improve its services enough to drive user growth, its "loss of influencers in key categories" and its risk of a network collapse are the "largest concerns" for the San Francisco-based company, the firm stated.

Shares of Twitter have been on the decline since the company reported weak 2016 first quarter results in April.

Twitter reported earnings of 15 cents per share on $594.5 million revenue, missing analysts' expectations of revenue of $607.8 million. The company estimates 2016 second quarter revenue in the range of $590 million to $610 million, below previous expectations of $677 million.

Twitter offers products and services for users, advertisers, developers and platform and data partners. The company's services and products include Twitter, Periscope and Vine.

Separately, TheStreet Ratings rated Twitter as a "sell" with a score of D.

TheStreet Ratings objectively rated this stock according to its "risk-adjusted" total return prospect over a 12-month investment horizon.

Not based on the news in any given day, the rating may differ from Jim Cramer's view or that of this articles's author. TheStreet Ratings has this to say about the recommendation:

This is driven by a number of negative factors, which TheStreet Ratings believes should have a greater impact than any strengths, and could make it more difficult for investors to achieve positive results compared to most of the stocks covered.

Among the areas TheStreet Ratings feels are negative, one of the most important has been a generally disappointing historical performance in the stock itself.

You can view the full analysis from the report here: TWTR

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