Earlier quoted context omitted.
AFAIK, this is called "Dumping the market". And it should not be legal...
Took me 30 seconds on the FTC website to find it: https://www.ftc.gov/tips-advice/competition-guidance/guide-a... Can prices ever be "too low?" The short answer is yes, but not very often. Generally, low prices benefit consumers. Consumers are harmed only if below-cost pricing allows a dominant competitor to knock its rivals out of the market and then raise prices to above-market levels for a substantial time. A firm…
Pricing below your own costs is also not a violation of the law unless it is part of a strategy to eliminate competitors, and when that strategy has a dangerous probability of creating a monopoly for the discounting firm so that it can raise prices far into the future and recoup its losses. In markets with a large number of sellers, such as gasoline retailing, it is unlikely that one company could price below cost long enough to drive out a significant number of rivals and attain a dominant position