VIIIX — Vanguard Institutional Index Fund Institutional Plus Shares NAV, chart and key statistics
Technical analysis2
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Addendum charts0
Fund facts#
Data provided bySource: Twelve Data- Expense ratio (prospectus)
- 0.02%
- Distribution yield
- Not shown
- YTD total return
- +11.96%
- YTD price return
- +10.18%
- Avg return 3Y
- +20.52%
- Avg return 5Y
- +10.99%
- AUM (whole fund, all share classes)
- $350.3B (2026-06-30)
- Fund family
- Vanguard
- 52W low
- $507.80
- 52W high
- $625.93
Performance · price returntotal return · as of 2026-11-12#
Data provided bySource: Twelve DataAbout VIIIX#
Objective: “Vanguard Institutional Index Fund (the “Fund”) seeks to track the performance of a benchmark index that measures the investment return of large-capitalization stocks.”
How it invests: “The Fund employs an indexing investment approach designed to track the performance of the S&P 500 Index (the “Target Index”), a widely recognized benchmark of U.S. stock market performance that is dominated by the stocks of large U.S. companies. Under normal circumstances, the Fund invests at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in the stocks that make up the Target Index. The Fund attempts to replicate the Target Index by investing all, or substantially all, of its assets in the stocks that make up the Target Index, holding each stock in approximately the same proportion as its weighting in the Target Index.”
Same portfolio as VINIX (Mutual fund, 0.035% a year): VIIIX is another share class of the same fund, so what differs between them is the fee and how each is bought.
Tracks: Vanguard Institutional IndexObjective and strategy as stated in the fund’s SEC prospectus filing.Official SEC filings ↗
Holdings#
502 holdings · top 10 = 39% · filed Jun 30, 2026Top 10 holdings
Sector weights
Estimated portfolio characteristics
Estimated by our own bottom-up analysis of the fund’s SEC-filed holdings; recomputed daily from public data.
Annualized returns (CAGR)#
Data provided bySource: Twelve DataCompound annual growth rate per holding period, total return (dividends reinvested), from weekly adjusted closes. Each column is anchored at the date under it; horizons the fund’s history can’t span are omitted.
Fund flows#
Net creations minus redemptions per period, from the fund’s SEC Form N-PORT filings (series-level: where a fund shares its portfolio with mutual-fund share classes, flows cover all classes combined). Quarterly filings publish with a ~60-day lag, so recent months appear as filings land. Flow data begins mid-2019 — Form N-PORT did not exist before then, for any fund.