That's too easy.
Selling off right now into the close will catch everyone off guard. That's a better way to create panic.
Bots do not hold overnight positions. And today's trading is probably 90% done by bots.
Yesterday's volume was not too bad.
There is no carry through today, but most of the quant trading happens during the last 30 minutes, so it is too early to tell.
There is a jargon for such behavior (wild swing before a paradigm shift), it is called flickering. So yes, 210 is possible.
Tuesday and today's rallies are truly mysterious.
Don't worry, some big boys will go against the trend and wipe out other less nimble big boys. It is a zero-sum casino game. Somebody has to give. The retail gamblers are at most icing on the cake.
Rumor of some kind of new stimulus from G7 meeting?
Or maybe a bunch of dead cat jumps up this morning and collectively decided to buy.
Or the Granny at the Fed drops coffee on a computer in Feds' basement, accidentally triggered a buy program?
It is probably about time for this "market" to drop dead.