On this episode of Stock Movers:

- iRobot (IRBT) shares drop after the company filed for bankruptcy and considers handing over control to its main Chinese supplier.

- Strategy Inc. (MSTR) stock falls after a near $1 billion purchase of Bitcoin as the cryptocurrency's price continues to drop.

- Zillow (Z) price tumbles 11% as Alphabet's Google has begun testing a new advertising format for real estate listings that could threaten portals like Zillow.

See omnystudio.com/listener for privacy information.