Roku’s CFO, Steve Louden, will step down after overseeing a period of rapid growth at the streaming video player firm. Revenues climbed 50.0% year over year in 3Q, dominated by sales of its platform as well as its own hardware. There may be signs that growth in the latter is slowing. U.S. seaborne imports linked to the firm and its products doubled in 2Q compared to a year earlier, but have subsequently slowed, including a 34.5% slump in November. The comparator period includes stockpiling ahead of tariffs, while televisions including the firm’s software became subject to tariffs in Sept...