Fidelity Mid Cap Index Fund (FSMDX) and Fidelity Small Cap Index Fund (FSSNX) have little to no holdings in common — their portfolios barely overlap.
Both funds' holdings are as of July 31, 2026.
Weight overlap
0%
Shared portfolio weight
Shared holdings
0
Securities in both funds
Funds
FSMDX · FSSNX
Compared side by side
Interactive charts, sector exposure, combined allocation, and the full overlap heatmap.
How each fund's equity holdings break down by sector, side by side — the clearest read on where the two funds tilt differently.
| Sector | In FSMDX | In FSSNX |
|---|---|---|
Financial Services | 13.3% | 18.7% |
Technology | 17.4% | 13.8% |
Healthcare | 11.1% | 20.0% |
Industrials | 16.4% | 13.4% |
Consumer Cyclical | 10.2% | 9.4% |
Real Estate | 7.1% | 6.9% |
Energy | 6.4% | 6.1% |
Utilities | 5.8% | 2.8% |
Basic Materials | 4.2% | 4.2% |
Consumer Defensive | 4.6% | 2.6% |
Communication Services | 3.3% | 2.2% |
Weights are of each fund’s classified equity holdings.
FSMDX
FSSNX
Two mutual funds overlap when they hold the same underlying securities. Holding both funds can leave you more concentrated than you think — you may own the same large companies twice, at a combined weight neither fund shows on its own. The weight overlap above is the share of portfolio weight the two funds hold in common: for every security both own, it counts only the smaller of the two weights (the slice you genuinely double up on). 0% means completely different books; 100% means effectively identical funds.
Computed on October 28, 2026 from the latest holdings each fund has published (dated at the top of the page). Holdings change over time. For information only — not investment advice.