Triple-Witching Day: Are Options Markets Being Manipulated?
Mark Hulbert - Barron's
Be on your guard against market manipulation on Friday, Sept. 15, which is a triple-witching day.
"Triple witching" refers to those four days each year—the third Fridays of March, June, September, and December—in which stock options, stock index futures, and stock index options all expire. It's widely known that such days often experience unusually heavy volume and volatility. But what has been less well-known is that prices on these days display a puzzling and costly pattern, according to a just-completed academic study. Retail options traders are the victims.
/jlne.ws/3sPAdS9
Mark Hulbert - Barron's
Be on your guard against market manipulation on Friday, Sept. 15, which is a triple-witching day.
"Triple witching" refers to those four days each year—the third Fridays of March, June, September, and December—in which stock options, stock index futures, and stock index options all expire. It's widely known that such days often experience unusually heavy volume and volatility. But what has been less well-known is that prices on these days display a puzzling and costly pattern, according to a just-completed academic study. Retail options traders are the victims.
/jlne.ws/3sPAdS9