CMKM Diamonds Inc (fka CMKX)

[Dain Bramage]

does this really happen?

Never in the real world. Often in someone's fantasy.

How MMs conduct business is not difficult to learn. The entire industry is highly regulated. Being a MM costs money, and you've got to have a license even before you start paying to make a market in a stock.

And, while we're on the subject, MMs short stocks all the time. Every day. It's a normal part of the routine.