The selling started on June 5 and did not stop for a week. Across hedge fund books, positions in the biggest American technology stocks came down in size — every one of the Magnificent Seven, the group of megacap names that drove the bull market, was reduced, according to trading data compiled by JPMorgan.
The Roundhill Magnificent Seven ETF, a fund that tracks the group, fell more than 2.4% over the stretch. Software stocks were sold deepest, while semiconductor names continued to draw demand, the data show. The pattern is unusual enough that JPMorgan’s strategists flagged it in client notes: a broad, coordinated reduction in the most crowded trades in the market.
The explanation circulating on trading desks is not that hedge funds lost faith in technology. It is that they needed the cash. SpaceX, the rocket company founded by Elon Musk, was preparing the largest initial public offering in market history, raising $75 billion, and institutions that wanted to participate had to free up room in portfolios already concentrated in megacap technology.
The dynamic is a familiar one in markets where supply is scarce. When a large new asset arrives, investors do not usually add to total risk; they rotate. Selling Microsoft or Amazon to buy SpaceX keeps a fund’s technology exposure intact while changing its composition. The JPMorgan data suggest the rotation was broad enough to move the prices of the very stocks being sold.
The primary market, in other words, is now large enough to shape the secondary market. SpaceX’s offering — roughly 4% of a $2.3 trillion company — absorbed tens of billions of dollars of institutional capital in a matter of days. Funds that wanted a seat at the table had to raise it, and the fastest source of cash was the largest, most liquid positions they held.
The selloff was not uniform. Software names, which carry the highest valuations and the most crowded positioning, bore the brunt. Semiconductor stocks, where earnings momentum remains strong, were comparatively protected, the JPMorgan data show. The distinction suggests fund managers were selling what was easiest to sell rather than what they believed in least.
For the Magnificent Seven, the episode shows how quickly liquidity conditions can shift. The group’s dominance of index weights and portfolio flows made it a source of strength for two years; it also made it the natural source of funds whenever a new opportunity appears. The same concentration that lifted the stocks now makes them vulnerable to rotation.
The rotation is visible in flows beyond hedge funds. Exchange-traded funds tracking technology reported outflows during the week, while desks that offer access to newly listed shares said demand ran far ahead of supply, according to traders. The pattern is consistent with a market that is reallocating rather than retreating: the money left the Magnificent Seven and reappeared, within days, in the largest IPO in history.
The episode also showed how the primary and secondary markets have become one machine. Twenty years ago, an IPO of this size would have been absorbed by a few dozen institutions over months. Today, the allocation process, the ETF market and the options desks move in the same week, and the effect on existing positions is immediate. Fund managers who want to own the newest giant must sell the oldest giants to pay for it, and the JPMorgan data suggest that is exactly what happened. The selling may not be finished.
The question for the weeks ahead is whether the selling continues. SpaceX’s stock closed its first day up 19%, and the fund managers who sold big tech to buy it have, so far, made the right call. If SpaceX consolidates its gains, more allocation may follow. If it stumbles, some of the money is likely to flow back.
JPMorgan’s strategists cautioned against reading the data as a signal about the technology sector’s fundamentals. Earnings for the largest software and hardware companies remain strong, and the artificial-intelligence buildout continues to drive capital spending. The reductions, they said, look tactical rather than strategic.
The episode also points to what comes next. OpenAI and Anthropic are preparing their own public offerings, and both are expected to be large. Each will trigger the same mechanics: funds will sell what they hold to buy what they want. With a pipeline of giant IPOs ahead, the pressure on existing megacap positions may not end with SpaceX.
For now, the tape tells the story. The Magnificent Seven ETF is down, SpaceX is up, and the hedge fund community has quietly rebalanced itself around the biggest new stock in a generation. Whether that rebalancing proves temporary or permanent will be visible in the next round of positioning data — and in the performance of the funds that made the switch.
