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SeedPublished 2026-10-23

Passive fund flows and price impact

Price impact and fund flows are among the fastest-growing keywords in the finance journals, yet none of the price-impact papers carries a fund-flow or passive-investing keyword. Now that passive funds hold so much of the market, how much do their flows move prices, and are markets as inelastic as some theories claim?

financemarket microstructure

What prompted this#

In the finance journals, "fund flows" had 7 papers in July–September 2026 against about 1 expected from its earlier share, and "price impact" had 12 against about 5 (see the finance dashboard). Since October 2025, 30 papers carry a price-impact keyword (27 in finance journals), and none of them carries a fund-flow, passive, index-fund or ETF keyword.

Questions#

  • How much does a dollar of passive inflow raise the prices of the stocks it buys, and does the effect revert?
  • Has the price impact of flows grown with the passive share, as the inelastic markets hypothesis predicts?
  • Who sells to passive funds when they buy: active funds, households or the firms themselves?

Data that could help#

Fund holdings and flows (CRSP Mutual Fund Database, Morningstar), ETF creations and redemptions, index reconstitution events and stock returns (CRSP).

Next step#

Estimate the price response to flow-induced trading around annual index reconstitutions, year by year from 2010 to 2025.

The keywords this note follows, in the tracked finance, accounting, economics, management, operations research and AI journals as of 2026-10-26
KeywordPapers, last 30 daysRankPapers per month, Oct 23 – Oct 26*Papers, last 36 months
price impact1#288177
fund flows1#288138
passive investing0–22

Markdown version of this note: /ideas/passive-flows-and-price-impact.md

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Cite this page

Scholar4AI. (2026). Passive fund flows and price impact. Journal Research Rankings. Retrieved October 23, 2026, from https://scholar4ai.com/ideas/passive-flows-and-price-impact

@misc{scholar4ai-ideas-passive-flows-and-price-impact,
  author = {{Scholar4AI}},
  title = {Passive fund flows and price impact},
  year = {2026},
  howpublished = {\url{https://scholar4ai.com/ideas/passive-flows-and-price-impact}},
  urldate = {2026-10-23},
  note = {Journal Research Rankings; data from OpenAlex (CC0); licensed CC BY-NC 4.0}
}

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