Yellow shares slump after trucking company files for bankruptcy and other stocks on the move

Here are some of the biggest movers of the day:

Stock gainers: Fortinet
FTNT,
-25.07%
stock rose 3%, after it plummeted 25% on Friday, when the cybersecurity firm warned that an unusually large volume of deals got pushed beyond the June quarter.

Palantir Technologies Inc.‘s stock
PLTR,
-2.73%
rose 1% as the company is slated to report quarterly earnings after the bell on Monday. Analysts polled by FactSet expect the software company to report adjusted earnings of 5 cents a share on sales of $533 million for the quarter.