On Thursday, shares of real-time social media platform Twitter Inc. are tumbling, down almost 5.5% in afternoon trading after its stock received a downgrade and price cut from Evercore ISI.

Evercore, a research firm, slashed its rating on TWTR stock to “Sell” from “Hold,” as well as reducing its price target on the company’s shares to $17 from $18.

In a research report, analyst Ken Sena pointed out that Twitter could face serious risks as rival social platforms, especially Snapchat, improve their ability for broadcasting. These competing apps are winning over more and more users and advertisers, which brings “more risk than reward” to the San Francisco-based company and its investors.

Over the past 12 months, TWTR has lost over 30% of its valuation, with its latest quarterly financial results giving investors little to celebrate. Looking ahead, guidance for the company’s fiscal 2016 third quarter suggests only 5% in growth, and in comparison to Facebook , that projection is incredibly meek.

TWITTER INC Price, Consensus and EPS Surprise

TWITTER INC Price, Consensus and EPS Surprise | TWITTER INC Quote

Twitter is still struggling with user growth and continued engagement, but its new product launches and sports partnerships with the NFL and the MLB, among other organizations, are steps in the right direction.

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