Fidelity Mid Cap Index Fund
U.S. stock index fund · tracks Russell Midcap Index
As of its 2026 Q2 report, Fidelity Mid Cap Index Fund held 808 positions with $50.04B in net assets. Its ten largest holdings made up 9.7% of the fund. The FSMDX share class costs 0.03% a year. Over the 12 months to May 2026, FSMDX returned 22.4%, with dividends reinvested. In 2026 Q3 it added 82 new positions and exited 63.
Fidelity Mid Cap Index Fund seeks to provide investment results that correspond to the total return of stocks of mid-capitalization United States companies.
The fund tracks the Russell Midcap Index, a market-capitalization-weighted index of mid-sized U.S. company stocks, using replication and holding most or all of the index constituents. Because the fund may not hold all securities in the index, its returns may diverge from the index.
What you own
| Company | Weight | Value | Shares | Reported price |
|---|---|---|---|---|
Fidelity Revere Street Trust | 2.11% | $1.05B | — | — |
SNDKSANDISK CORP | 1.16% | $580.92M | 529.8K | $1,096.51 |
1.09% | $547.62M | 1.3M | $434.52 | |
GLWCORNING INC | 0.95% | $475.00M | 2.9M | $164.24 |
0.93% | $462.93M | 1.4M | $328.49 | |
0.79% | $397.01M | 545.5K | $727.77 | |
0.72% | $361.00M | 1.5M | $243.04 | |
0.69% | $342.75M | 2.6M | $134.37 | |
CMICUMMINS INC | 0.68% | $342.08M | 509.8K | $671.01 |
0.57% | $284.40M | 1.1M | $252.58 |
Reported price is the fund's own reported value divided by its own reported shares at 2026-04-30 — not a live quote, and not what the fund paid.
The 200 largest of 808 holdings, with the share counts as filed, open with a free account.
What the fund is made of
Percentages are of fund net assets. Rounding, liabilities and short positions can make totals differ from 100%.
| Stocks | 99.71% |
| Cash & short-term | 2.34% |
| Derivatives | 0.02% |
| Bonds | 0.02% |
Derivatives are shown at market value, not notional exposure.
By sector
- Industrials
- 16.5%
- Information Technology
- 14.1%
- Financials
- 13.8%
- Health Care
- 10.4%
- 11 other sectors
- 45.1%
- Industrials
- 16.5%
- Information Technology
- 14.1%
- Financials
- 13.8%
- Health Care
- 10.4%
- Consumer Discretionary
- 8.3%
- Real Estate
- 6.7%
- Energy
- 6.1%
- Utilities
- 5.7%
- Consumer Staples
- 4.6%
- Materials
- 4.4%
- International
- 3.2%
- Communication Services
- 3.1%
- Cash
- 2.9%
- Other
- 0.2%
- Government
- 0.0%
How it has done
FSMDX share class · total returns with dividends reinvested
Volatility over the last 12 months: 10.71%. Past returns are a record, not a forecast.
Jun 2026 and Jul 2026 have been filed since the trailing figures were struck, so they are not in the table above or the curve — every figure here shares one cut-off, which is what makes them comparable with other funds.
Fees & fund details
Fidelity Mid Cap Index Fund is a U.S. equity index fund that tracks the Russell Midcap Index. 20% of FSMDX’s stock holdings are in companies whose revenue grew in the top quartile of U.S. companies over the last five fiscal years (covering 92% of the fund’s equity).
- Asset class
- Equity
- Region
- United States
- Management
- Index (passive)
- Fund type
- Open-end fund
- Expense ratio, by class
- 0.03%· FSMDX 0.03%
- Portfolio turnover
- 12.00% a year · as of 2026 Q2
Turnover is how much of the portfolio was replaced in a year.
Classified from what the fund holds, not from its name · 2026 Q2. The summary is a paraphrase of the prospectus; the objective is verbatim.
What changed this quarter
Positions that entered or left the fund since its previous filing. Positions that were only resized are not listed.
82 new· the largest 8
63 exited· the largest 8
Debt profile
What this fund holds — value-weighted across its bond and securitized long positions · as of 2026-04-30
Share of the fund's debt by how its coupon behaves — the fact that decides whether a rate move reaches this portfolio at all.
| Fixed rate | 100.0% |
Share of the fund's debt value in each maturity band, shortest first.
| <1y | 100.0% |
Based on what filers reported; a filer that never reported a flag also reads as none.
Understand how this fund fits with the rest.
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