Double Witching Definition
Double Witching develops
when option contracts and futures contracts expire on the same day.
The related options can be stock or index options, the futures can be index
futures. These days make the markets volatile sometimes because arbitragers
hurry to close their positions. Typical double witching phenomenon is the last
hour of the trading session on the third Friday of all months except March,
June, September, and December, when stock option and index option contracts
expire.