The US equity market witnessed a historic buying spree last week, with total ETF and single-stock purchases soaring to $5.9 billion—far surpassing the 52-week average of $2.3 billion. This surge, reported by BofA Securities, pushed the 4-week average inflows to $2.8 billion, highlighting exceptionally strong market sentiment. Institutional investors led the rally with $3.7 billion in purchases, the 10th-largest weekly inflow in at least 17 years. Corporations followed with $1.6 billion in buybacks, while retail investors and hedge funds added $0.4 billion and $0.2 billion, respectively. Notably, retail investors have now been consistent buyers in 33 of the last 35 weeks, underscoring their growing influence in US equities.
US Equity Buying Spree Hits Record Levels as Institutional Investors
US Equity Buying Spree Hits Record Levels:The US equity markets witnessed a remarkable surge in buying activity last week, with total purchases of exchange-traded funds (ETFs) and single stocks hitting an impressive $5.9 billion. This figure represents a dramatic increase compared to the 52-week average of $2.3 billion, highlighting the strong optimism currently driving investor sentiment across the market.
According to data from BofA Securities, this unprecedented wave of buying lifted the 4-week average of purchases to $2.8 billion, further confirming the sustained momentum in equity demand. What makes this surge particularly noteworthy is that it was broad-based, with institutional investors, corporations, retail clients, and hedge funds all participating in the buying spree.
Institutional Investors Dominate with Historic Buying
US Equity Buying Spree Hits Record Levels:Institutional investors were the key drivers of last week’s market activity. They purchased a staggering $3.7 billion worth of equities, marking the 10th-largest weekly buying volume in at least 17 years. This aggressive move underscores a high level of confidence among large investors in the resilience of US equities, despite ongoing concerns about interest rates, inflation, and global economic uncertainties.

For comparison, the average institutional inflows over the past four weeks were significantly lower, which makes last week’s surge stand out even more. The data indicates that institutions, which often act as a barometer for broader market sentiment, have shifted strongly toward risk-on behavior.
Corporations Step Up Buybacks
US Equity Buying Spree Hits Record Levels:Corporate clients also contributed significantly to the bullish momentum. Companies engaged in stock buybacks worth $1.6 billion last week, reinforcing the narrative that US firms remain confident in their long-term valuations and are committed to returning capital to shareholders. Corporate buybacks have been a consistent driver of equity market strength over the past decade, and the latest data shows they remain a powerful force supporting stock prices.
Retail Investors Continue Steady Participation
Retail investors, often considered an important pillar of market liquidity, added $0.4 billion to equities last week. While modest compared to institutional and corporate flows, this figure is consistent with a broader trend of persistent retail engagement.
Notably, individual investors have now been net buyers in 33 of the past 35 weeks. This consistency underscores the growing influence of retail participation in US equity markets, which has become even more pronounced since the pandemic era when retail trading platforms expanded accessibility.
Hedge Funds Add to the Rally
Hedge funds, though smaller contributors in terms of net volume, also participated in the rally. They bought $0.2 billion in equities last week. While this is the smallest figure among the major client groups, it still highlights that all investor categories—ranging from institutional giants to hedge funds and retail traders—were net buyers during the same week.
Market Sentiment at Multi-Year Highs
US Equity Buying Spree Hits Record Levels:The broad-based nature of this buying spree sends a strong signal about market sentiment. When every major investor group, including institutions, corporations, retail clients, and hedge funds, simultaneously positions themselves on the buy-side, it typically reflects confidence in future market gains.
The fact that institutional investors logged their 10th-largest weekly buying volume in nearly two decades, coupled with the ongoing support from corporate buybacks and persistent retail inflows, paints a picture of exceptionally strong sentiment. With a 4-week average purchase figure of $2.8 billion now trending higher, momentum could carry into the coming weeks.
What This Means Going Forward
For traders and long-term investors alike, these flows suggest that market confidence is not only robust but also widespread across investor classes. Such alignment often provides a cushion against short-term volatility, as sustained inflows help absorb potential sell-offs.
However, it is also worth noting that such rapid inflows can create overheated conditions, raising questions about valuations. Investors will be watching closely to see whether this trend continues in the weeks ahead or if it represents a temporary surge fueled by market optimism.
For now, the US equity markets appear to be enjoying one of their strongest periods of inflows in years, setting the stage for potential further gains if the momentum persists.
Disclaimer:
This article is for informational purposes only and is based on publicly available data and research reports. It does not constitute financial advice, investment recommendations, or a solicitation to buy or sell securities. Readers are advised to conduct their own research or consult with a qualified financial advisor before making any investment decisions. The author and the website are not responsible for any financial losses arising from actions taken based on the information provided in this article.