https://www.reuters.com/article/us-retail-trading-probes/factbox-the-u-s-agencies-probing-the-gamestop-reddit-rally-saga-idUSKBN2AI1CS

A raft of federal agencies are probing last month's "Reddit rally" in which Reddit users trading on low cost retail platforms banded together to push up GameStop Corp and other stocks, burning hedge funds that had bet against the companies.