Binance and Binance.us are two different entities and the one that SEC is dealing with now is the Binance.us.
However, the immediate effect of this news was not negative. Bitcoin prices and other coins also moved up even after this news. It shows the trust people have on bitcoin. Those who were investing casually are already out of the scene. The current holders have got strong hands and it means that prices for good crypto coins will only move up from here.
You expect to see this happen whenever a known exchange gets sued by SEC or anything that's related to hacking or any other negative news. The market's reaction will have it plummet for a while but get to see on what's the market status now. It's not that a lot that we've seen for the market to go down and the impact of it can be said not that much.