So what Roku started out the trading day by falling sharply after the latest Bureau of Labor Statistics data showed that the producer price index rose 0.4% for September, which was much higher than the 0.2% increase that most analysts were expecting. In the meantime, Roku's shares are likely to remain at least somewhat volatile as investors continue to weigh how rising inflation -- and the Fed's moves to tame it -- will affect the economy. What happened Shares of video-streaming platform provider Roku (NASDAQ: ROKU) dropped 3.5% this morning as investors processed the latest inflation data.