They named themselves after ants.

개미, gae-mi, noun. Ant. In market usage, an individual retail investor, as against the institutions and the foreign funds. Not an insult from the press. The word they use for themselves.

Small, and there are millions.

One ant moves nothing. The point of the word is the rest of them. Korea has one of the most active retail trading cultures anywhere, and the ants know what they are worth alone and what they are worth together.

Against the 재벌.

Chaebol, the family conglomerates that dominate the Korean economy. The ants trade the same market the chaebols run. Naming yourself the smallest thing on the floor is not modesty, it is a position.