For example if a party was to come and sell a lot of EMU in one shot at a sub market price, where the result of selling that volume would sink the price below a system wide agreed lower threshold, then the system itself would buy that EMU with assets it holds (if it has enough) at the threshold level.
This dominant market maker model of price stabilisation is similar to how nuBits works - the trick is to have more money available than anyone else in the market at all times in order to manipulate the price. However, although eMunie's MM will have more of its native token available than anyone else, where will it get the liquidity for the other side of the market from?
For that matter, where are these trades taking place?