It is my best guess that someone sold those $13.50 puts. If they finish in the money, they will be assigned the stock.
If someone bought 60,000 puts before the downgrade and knew about the downgrade coming = jail time
With CHK it's a storm now with dark clouds and it's hailing. On Thursday the sky will be blue, the winds will be calm and all of the children will be outside playing. It will be a beautiful day complete with birds chirping