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AstraEye Labs · Research methods · NEXUS
NEXUSU.S. equitiesInterstellar Financier plan

Institutional Positioning

Analyze 13F filing changes; identify new institutional positions, large liquidations, and conviction changes

  1. 01
    What it answers
  2. 02
    How it is computed
  3. !
    Keep in mind
  4. →
    Read a real report
Impersonal research. AstraEye Labs is not a registered investment adviser, does not give financial advice, and does not know your goals or risk tolerance. This research does not account for your individual goals, risk tolerance, financial situation, or other circumstances. Past performance does not predict future results.
01The analysis

What it answers

Shows how big institutions changed their positioning in a stock last quarter. It reads 13F filings for total institutional holdings percentage, net quarter-over-quarter change, top-10 holder concentration, and new-versus-exited holder counts. Each ticker is labeled increasing, stable, or decreasing conviction, and a net increase above 3% raises a watch. Use it to see where institutional money is flowing, keeping in mind 13F data is quarterly and up to 45 days stale, so it reflects past rather than live positioning.

Scientist
NEXUS
Asset class
U.S. equities
Securities it can describe
Stocks
Plan
Included from the Interstellar Financier plan
02The method

How it is computed

13F filings - real regulatory data with a lag and a coverage gap that together decide how it can be read.

WHAT A 13F IS. Institutional investment managers exercising discretion over at least $100 million in 13(f) securities must file a quarterly report of their holdings with the SEC within 45 DAYS of quarter end. It is one of the few genuine windows into professional positioning, and it is public.

THE THREE LIMITS THAT GOVERN EVERY READING, and a student should be able to recite them.

  • IT IS STALE BY CONSTRUCTION. A position held on the last day of a quarter is disclosed up to 45 days later, so at the moment of publication the data describes a portfolio up to about six weeks old - and a manager may have exited entirely in the interim. By the time the next filing arrives the picture is up to four and a half months old.
  • IT IS LONG-ONLY. 13F covers 13(f) securities held long. SHORT positions are not reported at all, and much derivative, debt, non-US and private exposure falls outside it. So a manager shown as heavily long a name may be hedged or net short through instruments the filing cannot see. 'Institutional positioning' from a 13F is one side of a book.
  • IT IS A SNAPSHOT, NOT A PATH. Quarter-end holdings say nothing about what happened in between. A position bought and sold within the quarter is invisible; one bought on the final day looks identical to one held throughout. Quarter-end is also when window dressing has historically been alleged.

WHAT IT IS GENUINELY GOOD FOR. Slow, structural shifts in ownership - a name being accumulated across many managers over several quarters is real information, precisely because the aggregate moves too slowly for the lag to matter much. Reading it for anything faster is reading it wrong.

NEW VERSUS EXITED HOLDER COUNTS are more robust than dollar changes, because a holder count is unaffected by price: a position that merely appreciated shows a larger value with no decision behind it, while an added or dropped holder is a decision.

TOP-10 CONCENTRATION carries the same caveat as every concentration measure here - it is concentration of REPORTED LONG HOLDINGS, and one manager may run many funds.

Keep in mind

The conviction labels are our own convention.

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