Goldman Sachs has reported significant activity in global equity markets, with systematic trading strategies, including those run by hedge funds, contributing to the sale of approximately $109 billion in global equity futures over the past month. Last week, $81 billion was sold out of global equities, with $24 billion specifically from the S&P 500. Despite the sell-off, hedge funds engaged in their largest one-day buying spree in five months last Monday, coinciding with a 4.25% drop in the S&P 500. Goldman Sachs strategist Scott Rubner noted that Commodity Trading Advisors (CTAs) are projected to sell up to $64 billion in global stocks if market conditions worsen. The stock dump was sparked by a yen spike, and activity levels have decreased by 40% compared to the previous two weeks.