Amazon Becomes Hedge Funds' Most Crowded Position as Tesla Short Interest Surges
nashnova research
Hazeltree data shows Amazon became North American hedge funds' most crowded stock at the end of September, while funds shorting Tesla now outnumber longs nearly two-to-one — capital inside the Mag 7 is splitting sharply.
Amazon is "most crowded" — what does that actually mean?
Hazeltree tracks trading activity across more than 700 funds globally. Its end-of-September data ranks Amazon No. 1 in North American hedge-fund crowdedness, with Microsoft and Applied Materials at second and third.
"Crowded" does not equal bullish. Tim Smith, Hazeltree's director of data insights, notes that funds may be shorting Amazon via options or other instruments.
Yet Amazon has appeared on the top-ten crowded-long list for North American large caps every month this year. This means → despite the ambiguity in the crowdedness metric itself, the long-side signal has been consistent.
Amazon shares are down 2.5% since early September, but up 9.9% year-to-date.
The Magnificent Seven — where is the money flowing?
At the end of Q3, Alphabet saw a moderate increase in long positioning; Meta, Microsoft, and Nvidia posted smaller gains.
The Roundhill Magnificent Seven ETF is up 6.9% since early September, led by Meta and Microsoft.
In plain terms = institutional money is not spreading evenly across all seven names — it is concentrating along advertising and cloud (Meta, Microsoft).
Tesla — why is short interest surging yet it doesn't make the "most crowded short" list?
The number of funds holding Tesla longs edged down, while short-side funds jumped significantly — shorts now outnumber longs nearly two-to-one.
Short-term returns on the short have been flat: Tesla is down just 1% since early September. Over a longer horizon, shorts have done well — the stock is down 19% year-to-date.
The key signal: Tesla has not appeared on the top-ten crowded-short list for North American large caps in any month this year. This reflects a pattern where large investors are simply avoiding the stock rather than actively building short positions.
Put simply = Wall Street's stance on Tesla is not "bet against it" but "don't touch it" — and that signals a deeper loss of conviction than a concentrated short would.
Apple is also net-short — how does it differ from Tesla?
Apple likewise shows more funds short than long, making it and Tesla the two Mag 7 members where bears outnumber bulls.
This means → a clear bifurcation has emerged inside the Magnificent Seven: Amazon, Meta, and Microsoft are attracting fresh capital, while Tesla and Apple are being sidelined or shorted.
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