I won't worry at the moment. Do not forget that the steem price tripled just a short time back.
The top price is quite stable. Just now the satoshi price plummets, but then BTC is rising like on steem ;)
Still -16% in one day (currently on Polo) shows that the peg is working. Speculators are going for a steem/SBD change. They cannot do that forever without losing a lot of money.
The SBD creation has increased and SBD are being sold. The price will go down finally. And if not - well content creators are all get quite a bit richer then normal, so thats okay too ;)