Shares of iRobot Corp. IRBT, +0.90% are down 5.5% after Bloomberg reported that Amazon.com Inc. AMZN, +5.69% was working on building robots for the home. The robot project is code-named Vesta after the Roman goddess of the home, according to several people familiar with the company's plans. Bloomberg said that it was "unclear what tasks an Amazon robot might perform" but that those familiar with the project speculated that the robot could be "a sort of mobile Alexa." Shares of iRobot, which makes the Roomba vacuum, are down 11% over the past 12 months. The company delivered a weak outlook in February. Amazon shares are up 70% and the S&P 500 SPX, +1.05% is up 14%.