Hedge funds were net buyers of roughly $6.8 billion in US equities last week, marking the largest single-week purchase since 2007, according to prime brokerage flow data that tracks institutional client activity. The figures suggest a sharp increase in risk appetite, as weekly net flows are more commonly measured in the hundreds of millions or low single-digit billions. Because prime brokers provide financing and securities services to hedge funds, their aggregated client data offers a broad read on industry positioning, even though it does not disclose individual funds, stock picks or sector allocations. That lack of detail limits conclusions about whether the buying was concentrated in areas such as megacap technology, cyclicals or spread across the wider S&P 500. The 18-year comparison is significant because it spans the global financial crisis, the European sovereign debt scare, the pandemic crash and the recent rate-hiking cycle, none of which produced a stronger single-week net purchase of US equities by hedge funds.