This platform supports shorting. To short the SBD under this system you would buy a bunch of SBD and convert it to steem. imagine if the price of SBD was $1.02, meaning you can pull $1.02 of steem out of a CDP for 1 SBD. When the price of SBD renormalized at $1.00 you would be able to buy $1.02 worth of SBD with what previously was $1 of SBD. The leverage would have to come from off platform. If you don't count unleveraged shorts I don't know if the Maker platform supports shorts.
RE: Proposal of how to stabilize SBD