[firethief]

I think you are confusing the possibility being present with the possibility being realized. In a free market, that possibility is present but unrealized. The possibility doesn't make the market non-free (and anything that would prevent such possibility would make the market strictly speaking non-free), but when entities choose to act on that possibility the market is no longer free.

[antidesitter]

You didn't say it was possible (which almost anything is in this context). You said it was inevitable.