Facebook set the record for the largest one-day loss of market value in July 2018.
Facebook lost about $119 billion in market capitalization on July 26, 2018, after the company reported disappointing user-growth and revenue expectations. Its share price fell sharply, reducing the value of all outstanding shares in a single trading session.
The decline followed Facebook’s second-quarter earnings report and management warnings that revenue growth would slow while the company invested more heavily in privacy, security, and content review. The loss was measured in market value, not cash removed from Facebook’s bank accounts.
Facebook later changed its corporate name to Meta Platforms in 2021, but the 2018 event occurred while the company was still called Facebook. The record was eventually surpassed by other companies during later market shocks, so it should be understood as a record reported at that time rather than a permanent all-time ranking.