Hacker News Reader

They added new strikes before open today, but I'm guessing yahoo finance wasn't designed to handle that.

And it opened at 233 and has traded between 150 and 300 today.

In English?

It outperformed everyone's expectations.

and then crashed beyond everyone's expectations

Puts and calls are the two types of options contracts. They are created and trade in a range around the current price. Typically, this range is wide enough that it covers all moves of the underlying stock price. In this case, the price move exceeded what the professionals thought was even possible as a long shot bet.