Why TiVo, Stratasys, and iRobot Stocks Popped 10% Today

News that vaccine-maker Moderna Inc. has a (probably) successful vaccine candidate to prevent the SARS-CoV-19 coronavirus sent stock markets flying on Monday. By close of trading, the S&P 500 Index had scored a 3.5% gain.

Surprisingly, some of the stocks enjoying some of the biggest gains today, though, were ones that might not benefit much from the end of the pandemic -- indeed, they might lose some of the advantages they gained from it.

In trading earlier today, shares of DVR-maker TiVo Corporation (NASDAQ: TIVO), of 3D printer-maker Stratasys (NASDAQ: SSYS), and robo-vacuum manufacturer iRobot (NASDAQ: IRBT) all gained roughly 10% or more, and held onto most of those gains throughout the day.