ETFIQ
RankingsCompareHoldingsFlowsResearch
Ask ETFIQETF ModelsMy portfolioWeekly note
A
vs
B
Share on XDownload as PDFOpen liveAsk about these two funds

BLDX vs CSIO: which is really different?

CSIO holds 54.2% of its weight in S&P 500 companies and BLDX 36.0%. Impax Global Sustainable Infrastructure ETF and Cohen & Steers Infrastructure Opportunities Active ETF.

BLDX costs 0.05 points a year less; BLDX is 2.7 times larger.

BLDXCSIO
Expense ratio0.60%0.65%
Net assets, as of Jun 30, 2026$118m$44m
What it tracksInfrastructureInfrastructure
Holdings in commonnot published
S&P 500, total return, since Feb 2, 2026+12.8%
S&P 500, total return, since Dec 10, 2025+14.4%
Against the S&P 500, since Feb 2, 2026behind by 13.4 pts
Against the S&P 500, since Dec 10, 2025behind by 2.8 pts
Below its all-time high9.7%, high on Apr 8, 20265.3%, high on Jul 24, 2026
36.0%
BLDX in the S&P 500
54.2%
CSIO in the S&P 500
−0.6%
BLDX total return, since launch
+11.6%
CSIO total return, since launch
BLDX · 6 months to Oct 9, 202664% of its weight is outside the S&P 500
64% of its weight is outside the S&P 50036% of BLDX's weight is in S&P 500 companies and 64% is outside the index. Holdings as of Jun 30, 2026.36%64%of its weight in S&P 500 companiesof its weight outside the S&P 500active share 97% · top ten 40% of the fund · 38 holdings as filed for Jun 30, 2026 · Nasdaq-100: 3% in64% of its weight is outside the S&P 50036% of BLDX's weight is in S&P 500 companies and 64% is outside the index. Holdings as of Jun 30, 2026.36%64%inoutside the S&P 500active share 97% · Nasdaq-100: 3% in

36% of BLDX's weight is in S&P 500 companies and 64% is outside the index. Holdings as of Jun 30, 2026.

CSIO · 6 months to Oct 9, 202646% of its weight is outside the S&P 500
46% of its weight is outside the S&P 50054% of CSIO's weight is in S&P 500 companies and 46% is outside the index. Holdings as of Jun 30, 2026.54%46%of its weight in S&P 500 companiesof its weight outside the S&P 500active share 99% · top ten 52% of the fund · 29 holdings as filed for Jun 30, 2026 · Nasdaq-100: 7% in46% of its weight is outside the S&P 50054% of CSIO's weight is in S&P 500 companies and 46% is outside the index. Holdings as of Jun 30, 2026.54%46%in the S&P 500outsideactive share 99% · Nasdaq-100: 7% in

54% of CSIO's weight is in S&P 500 companies and 46% is outside the index. Holdings as of Jun 30, 2026.

ETFIQ Off-Index Score · CSIO scores higherHow much of it is not the index it is sold as an alternative to?
0.1, the lowest in this set92.3, the highest

A percentile among the 391 thematic ETFs with a holdings filing. All thematic ETFs ranked by it → How it is computed →

Performance, window by window

Total returnvs the S&P 500vs the Nasdaq-100
WindowBLDXCSIOBLDXCSIOBLDXCSIO
3 months−5.3%−4.3%−8.6 pts−7.6 pts−8.9 pts−7.9 pts
6 months−6.8%−2.6%−22.0 pts−17.7 pts−30.0 pts−25.8 pts
Since launch
BLDX Feb 2026 · CSIO Dec 2025
−0.6%+11.6%−13.4 pts−2.8 pts−21.0 pts−8.7 pts

Source: ETFIQ. Open the live comparison on ETFIQ →

On the same fields

BLDX
Impax Global Sustainable Infrastructure ETF · Holds 38 stocks in infrastructure, 36% of its weight in S&P 500 companies
CSIO
Cohen & Steers Infrastructure Opportunities Active ETF · Holds 29 stocks in infrastructure, 54% of its weight in S&P 500 companies
Issuer Impax Cohen & Steers
Theme Infrastructure Infrastructure
In the S&P 500 36.0% 54.2%
Active share vs the S&P 500 96.6% 99.0%
In the Nasdaq-100 3.3% 6.8%
Holdings 38 29
Top ten, share of the fund 39.6% 51.9%
Expense ratio 0.60% 0.65%
Fee for the differing part 0.62% 0.66%
Total return, 1 year −0.6% (since it first traded on Feb 2, 2026) +11.6% (since it first traded on Dec 10, 2025)
vs the S&P 500 −13.4 pts −2.8 pts
vs the Nasdaq-100 −21.0 pts −8.7 pts
Below its high −9.7% −5.3%
Net assets, as of Jun 30, 2026 $118m $44m

As of Oct 9, 2026. Source: ETFIQ.

BLDX in plain words

By weight, 36% of BLDX's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 97%. The top ten holdings are 40% of the fund across 38 positions, as filed for Jun 30, 2026. Since it first traded on Feb 2, 2026 the fund returned −0.6% with distributions reinvested against +12.8% for the S&P 500, so a holder was behind by 13.4 pts. It sits 9.7% below its all-time high of Apr 8, 2026.

CSIO in plain words

By weight, 54% of CSIO's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 99%. The top ten holdings are 52% of the fund across 29 positions, as filed for Jun 30, 2026. Since it first traded on Dec 10, 2025 the fund returned +11.6% with distributions reinvested against +14.4% for the S&P 500, so a holder was behind by 2.8 pts. It sits 5.3% below its all-time high of Jul 24, 2026.

Questions people ask

Which is more different from the S&P 500, BLDX or CSIO?
BLDX has 36% of its weight in S&P 500 names and CSIO has 54%, so CSIO differs more from the index.
Which is cheaper, BLDX or CSIO?
BLDX charges 0.60% a year and CSIO charges 0.65%, so BLDX is cheaper. Fees come from each fund's prospectus.
Other comparisons
BLDX vs RBLDBLDX vs GLIXBLDX vs NFRXBLDX vs EFRACSIO vs NFRXCSIO vs RIFRCSIO vs RBLDCSIO vs GLIX
BLDX on its own →CSIO on its own →How every figure is computed →Standards and sources →
Where these figures came from
BLDX filings on SEC EDGAR ↗BLDX prospectus with the expense ratio (SEC) ↗Impax website ↗CSIO filings on SEC EDGAR ↗CSIO prospectus with the expense ratio (SEC) ↗Cohen & Steers website ↗

ETFIQ links to the documents behind every figure; a link is not an endorsement. A comparison is not a recommendation.

How this is computed

It is a position in a set, not a rating, and neither end of it is a recommendation.

Every figure is an ETFIQ calculation with distributions reinvested.

Cite this page

ETFIQ, BLDX against CSIO, data as of Oct 9, 2026. https://etfiq.com/compare/themes/bldx-vs-csio

Open data

Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms.