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ETF · holdings as filed 2026-05-31

What's inside FIBUX?

Fidelity Flex U.S. Bond Index Fund
Holdings
5,769
positions in the fund
Top 10
9%
of fund assets
Expense ratio
0.00%
net, per year
Fund size
$4B
total net assets

Top 20 holdings

RankLogoTicker / NameWeight
1
?
—Fidelity Revere Street Trust
1.63%
2
T
T 4.125 02.15.36US TREASURY N/B
1.14%
3
T
T 3.5 01.15.29US TREASURY N/B
0.94%
4
T
T 3.875 05.31.27US TREASURY N/B
0.92%
5
T
T 3.625 08.31.27US TREASURY N/B
0.88%
6
T
T 4.5 02.15.44US TREASURY N/B
0.81%
7
T
T 3.5 10.15.28US TREASURY N/B
0.80%
8
T
T 3.875 04.15.29US TREASURY N/B
0.80%
9
T
T 4 12.15.27US TREASURY N/B
0.79%
10
T
T 4.625 02.15.46US TREASURY N/B
0.77%
11
T
T 3.625 08.15.28US TREASURY N/B
0.69%
12
T
T 4.125 04.30.33US TREASURY N/B
0.66%
13
T
T 4.25 02.15.54US TREASURY N/B
0.65%
14
T
T 3.5 12.15.28US TREASURY N/B
0.63%
15
T
T 5 05.15.45US TREASURY N/B
0.60%
16
T
T 3.75 05.15.28US TREASURY N/B
0.59%
17
T
T 4.625 11.15.45US TREASURY N/B
0.58%
18
T
T 3.875 06.15.28US TREASURY N/B
0.57%
19
T
T 4 04.30.32US TREASURY N/B
0.57%
20
T
T 4.25 02.15.28US TREASURY N/B
0.56%
Sectors
Top holdings — Bonds & Fixed Income
Your 10 largest positions in this sector
1
T
T 4.125 02.15.36US TREASURY N/B
1.14%
2
T
T 3.5 01.15.29US TREASURY N/B
0.94%
3
T
T 3.875 05.31.27US TREASURY N/B
0.92%
4
T
T 3.625 08.31.27US TREASURY N/B
0.88%
5
T
T 4.5 02.15.44US TREASURY N/B
0.81%
6
T
T 3.5 10.15.28US TREASURY N/B
0.80%
7
T
T 3.875 04.15.29US TREASURY N/B
0.80%
8
T
T 4 12.15.27US TREASURY N/B
0.79%
9
T
T 4.625 02.15.46US TREASURY N/B
0.77%
10
T
T 3.625 08.15.28US TREASURY N/B
0.69%
Geography
Top holdings — United States
Your 10 largest positions in this country
1
T
T 4.125 02.15.36US TREASURY N/B
1.14%
2
T
T 3.5 01.15.29US TREASURY N/B
0.94%
3
T
T 3.875 05.31.27US TREASURY N/B
0.92%
4
T
T 3.625 08.31.27US TREASURY N/B
0.88%
5
T
T 4.5 02.15.44US TREASURY N/B
0.81%
6
T
T 3.5 10.15.28US TREASURY N/B
0.80%
7
T
T 3.875 04.15.29US TREASURY N/B
0.80%
8
T
T 4 12.15.27US TREASURY N/B
0.79%
9
T
T 4.625 02.15.46US TREASURY N/B
0.77%
10
T
T 3.625 08.15.28US TREASURY N/B
0.69%
Geography reflects each issuer's registered business address per SEC EDGAR filings where available, falling back to the exchange or listing where no SEC filing exists — not necessarily where a company's stock is primarily listed (e.g. TSMC is classified as Taiwan even though its ADR trades on the NYSE).
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Data source: official SEC Form N-PORT filings (as of 2026-05-31); expense ratio from SEC prospectus (risk/return) filings. Fund holdings are disclosed quarterly and may reflect a 60-day reporting delay.
Informational and educational only — not investment advice.