Goldman Sachs says the market is about to get wild in October


Stock volatility has been 25% higher in October on average ever since 1928, according to Goldman equity derivatives strategist John Marshall.

Big price swings have been seen in each major stock benchmark and sector over the past 30 years, with tech and health care being the most volatile groups, Goldman said.

“We believe high October volatility is more than just a coincidence. We believe it is a critical period for many investors and companies that manage performance to calendar year-end,” Marshall said.