https://www.cnbc.com/2019/04/04/roku-sinks-on-report-that-amazon-is-betting-big-on-streaming-tv-ads.html

Shares of Roku sank more than 9 percent on Thursday as traders reacted to a report from Cheddar that Amazon is planning to beef up advertising on its streaming TV products. Meanwhile, Guggenheim downgraded the stock Thursday morning.

Amazon is seeking million of dollars from advertisers to help grow its Fire TV platform to compete with Roku and Pluto TV, Cheddar reported. Amazon is reportedly asking for cable-network sized dollar amounts for its ad space, but marketers have been hesitant without knowing the content Amazon is going to put on its channels. Amazon's new TV content is expected to be available in the fall.