FSPSX vs FZROX: 1% overlap
Fidelity International Index and Fidelity ZERO Total Market Index share 0.7% of their portfolios by weight — computed as Σ min(wA, wB) over every holding both funds own.
Different holding dates. These holdings were published about 2 months apart — FSPSX as of 2026-02-28, the rest through 2026-04-30. Each fund is compared using its most recent file, so any trading in between shows up as a difference.
You would hold two tickers and get the diversification of 2.0. Two funds that shared nothing would score 2.0; two identical funds score 1.0.
Top shared holdings
FSPSX and FZROX hold 2 of the same securities. The ten contributing most to the overlap figure:
| Holding | in FSPSX | in FZROX | Δ |
|---|---|---|---|
| CASH | 1.8% | 0.6% | 1.2% |
| UST | 0.0% | 0.0% | 0.0% |
Where FSPSX and FZROX differ
Sector weights as a share of each fund, ordered by the size of the gap rather than the size of the sector — two funds that overlap heavily still usually diverge somewhere.
| Sector | FSPSX | FZROX | Δ |
|---|---|---|---|
| Unclassified | 98.0% | 3.8% | +94.3pp |
| Information Technology | 0.0% | 32.3% | −32.3pp |
| Financials | 0.1% | 11.8% | −11.8pp |
| Communication Services | 0.1% | 10.1% | −10.1pp |
| Consumer Discretionary | 0.0% | 9.6% | −9.6pp |
| Industrials | 0.3% | 9.2% | −8.9pp |
| Health Care | 0.0% | 8.6% | −8.6pp |
| Consumer Staples | 0.1% | 4.6% | −4.6pp |
Δ is FSPSX minus FZROX, in percentage points. Sector data is not published by every issuer, so “Unclassified” is a real category rather than a gap in the table.
What each fund holds alone
98.6% of FSPSX by weight, held in no part of FZROX.
99.7% of FZROX by weight, held in no part of FSPSX.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| FSPSX | FZROX | |
|---|---|---|
| Top 10 holdings | 14.3% | 34.0% |
| Positions held | 701 | 2,685 |
| Cost per $10,000 held, per year | $4 | $0 |
Cost is the expense ratio applied to $10,000; it excludes any brokerage commission, bid-ask spread or tax consequence. Figures are facts about the funds, not a suggestion about which to hold.
Frequently asked
How much do FSPSX and FZROX overlap?
FSPSX and FZROX overlap 0.7% by portfolio weight — largely distinct portfolios. They share 2 holdings. The figure comes from current issuer holdings files (FSPSX as of 2026-02-28, FZROX as of 2026-04-30).
How is the overlap between FSPSX and FZROX calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If FSPSX holds a stock at 6% and FZROX holds the same stock at 4%, 4% counts as shared. The result is bounded between 0% and 100%, and it is computed after looking through any fund-of-funds to the underlying holdings.
Is it redundant to hold both FSPSX and FZROX?
That depends on your goals — we state facts, not advice. At 0.7% overlap, each fund still contributes meaningfully distinct exposure.
What does FSPSX own that FZROX doesn't?
FSPSX holds 701 positions and FZROX holds 2,685; 699 of FSPSX's positions don't appear in FZROX at all, and they are 98.6% of FSPSX by weight.
You probably hold more than two funds
This page compares FSPSX and FZROX. Paste your whole portfolio — brokerage, 401(k), IRA — and see the overlap across every fund at once, plus what you actually own underneath them and your own Effective Funds number. Free, no account, nothing stored.
X-ray my portfolio — free →Watch FSPSX vs FZROX
We re-read both funds’ published holdings every weeknight. Leave an address and we'll tell you when what's inside actually changes.
Not sending yet — email alerts are built but switched off, and you'll be among the first when they turn on. No spam, one-click unsubscribe.
Related comparisons
Sources: issuer holdings files, FSPSX as of 2026-02-28, FZROX as of 2026-04-30. Weights are fractions of each fund. Diagnostics, not advice.