Things known for a fact before today:
The last three 2-day selloffs resulted in a rally off the low of 19.25, 30, and 26.25 points. So a move of 20 to 30 points from 975 was obviously projected.
I have pointed out for awhile now that implied vol was well in excess of actual vol which leads one to obviously assume market makers are short options and the public is long them, so keeping the market around 1000 for awhile makes perfect sense.
Now that they have accomplished both objectives, we have to wait for further action to see what is next.