JPMorgan: $165B in stock selling could hit markets next week

JPMorgan is flagging a sizeable mechanical sell flow into month-end. A wave of equity selling tied to quarter-end rebalancing could total as much as $165 billion before June closes, according to JPMorgan strategists, as major institutional investors realign portfolios following a strong run for equities.

It is forced flow, not a fundamental call. But with hedge fund leverage stretched and tech positioning crowded, the timing matters for traders.

Where the selling comes from

JPMorgan calculates that U.S. defined benefit pension funds, which manage approximately $9.6 trillion in assets, could account for around $55 billion in equity selling, reflecting the historically loose rebalancing discipline of pension funds relative to more rules-based vehicles.

Japan’s Government Pension Investment Fund, with approximately $1.9 trillion in assets, is estimated to sell around $60 billion in global equities, with an equivalent bond-buying flow. Norway’s Norges Bank, managing a $2.1 trillion sovereign wealth fund and owning roughly 1.5% of every listed stock on earth, could sell around $40 billion. The Swiss National Bank could sell around $25 billion, though that number drops to just $8 billion if it raises its target stock allocation instead.

There is some offset on the buy side. Balanced mutual funds operating on stricter monthly rebalancing schedules present a partial offset. JPMorgan estimated this universe at around $4 trillion in assets, with month-to-date returns on global equities roughly flat and bonds modestly positive, implying net equity buying of approximately $15 billion.

Why this quarter-end is different

For comparison, JPMorgan’s estimate for the September 2025 quarter end was only around $57 billion. This is nearly three times that size.

The rebalance is hitting at an awkward moment for positioning. Global hedge fund net leverage reached a four-year high in June, driven by aggressive buying and mark-to-market gains, Goldman Sachs prime brokerage data shows. Gross leverage hit about 294%, a five-year high, according to Goldman data cited by Reuters. The past four weeks saw the steepest leverage increase in roughly five years, fueled by net buying and rising portfolio values.

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Semis are the pressure point

JPMorgan’s Nikolaos Panigirtzoglou flagged a specific vulnerability inside the rally. These value-at-risk shocks strike when volatility breaches funds’ internal limits and forces selling. His team calculates that semiconductors’ share of global equity value is now more than six times their share of revenue. That is over double the comparable figure for the Magnificent Seven. The concentration leaves the rally in AI stocks exposed if sentiment turns.

JPMorgan identified concentration risk, where the growing share of semiconductor stocks can become binding for funds with self-imposed risk limits, forcing mechanical selling when thresholds are breached.

Does it actually move the tape?

History says these warnings often get absorbed. In June 2023, JPMorgan warned of $150 billion in selling and said it could pull global stocks down by as much as 5%. The S&P 500 rose 6.6% that month instead.

The reason this selling keeps getting absorbed comes down to what happens on the other side. Companies have been buying back their own stock at one of the fastest paces ever recorded, and retail investors have continued buying through nearly every dip this year.

Context check: at just 0.25% of the $65 trillion U.S. stock market, the $165 billion rebalancing wave is a technical event, not a fundamental threat.

Options market and stocks to watch

Watch for elevated quarter-end flow and volatility in the names most exposed to mechanical rebalancing and crowded positioning.

SPY: Watch for end-of-month tape pressure as pension and sovereign rebalancing concentrates into the final sessions of June.

QQQ: Watch for two-way flow given how stretched tech positioning is heading into the rebalance.

SMH: Watch the semis ETF closely, JPMorgan flagged semiconductors as the most concentrated and VaR-shock-prone segment.

NVDA: Watch for outsized options activity, the largest weight in the crowded AI trade.

TLT: Watch the bond side, rebalancing implies meaningful equity-to-bond rotation flows.

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