41. The expiration, known as " triple witching , " can send the Dow plummeting. 42. Are we going back to the witching days when we kill and burn people for being insane? 43. Similarly, " double witching " volume shot up to 419 million shares in March. 44. That meant the cruelest part could still come around the witching hour, but the Indians survived. 45. Today's triple-witching in the financial markets could bring record volume, he said. 46. Today marks the " double witching " expiration of equity options and equity index options. 47. But the " double witching " factor did not seem to be influencing trading much. 48. Traders attributed part of today's gain to tomorrow's " triple witching ." 49. Triple witching is the quarterly expiration of contracts on stock options, index options, and index futures. 50. Traders attributed much of the selling to Friday's " double witching " options expiration.