Infrastructure ETFs diverged nine points in September

First Trust's American industrial renaissance ETF CAIRR holds specialty contractors, electrical equipment, and a defense name. The iShares U.S. Infrastructure ETF AIFRA is 42% utilities, led by Union Pacific and NextEra Energy. They share a ticker word. They do not share a business. As of Wednesday morning, September 9, the contractors had a different month from the utility book, and that gap is the infrastructure story.

The public-works cycle is running on a short continuing resolution. The private cycle is an electrical buildout sized for data centers. Funds that share the label are bets on different bottlenecks.

The public bill and the private grid

On Wednesday, September 2, a continuing resolution became law that keeps federal highway programs running through December 11. It does not keep the extra grants from the 2021 Infrastructure Investment and Jobs Act flowing after October 1. The 2021 law’s surface-transportation authorizations were due to lapse on September 30. The resolution stretches ordinary highway and transit authority; it does not extend the extra, pre-funded grant programs that sat on top of regular Highway Trust Fund money. Those programs face a gap when the federal fiscal year starts on October 1. The House Transportation Committee approved a five-year successor bill, the BUILD America 250 Act, in May. It is not law.

That checkpoint matters for the contractors in Global X’s U.S. development ETF APAVE and the engineers in CAIRR, and not at all for landing fees at Aena, the Spanish airport operator.

The other spending cycle is private and electrical. In its April 2026 update on energy and AI, the International Energy Agency projected data-center electricity use roughly doubling from 485 TWh in 2025 to about 950 TWh in 2030, around 3% of global electricity demand. The agency has also noted that the energy system meeting that load still requires longer lead times than the data centers themselves. The First Trust smart-grid ETF BGRID now holds $11.9 billion, close behind APAVE’s $13.9 billion. Quanta Services is 7.57% of BGRID, 5.84% of the iShares U.S. power-infrastructure ETF BPOWR ($462 million), 3.84% of AIFRA, and 2.98% of APAVE. The contractor is up 50% year to date even after a 20% retreat from its 52-week high. Buy BGRID and APAVE and you mostly avoid that stack: the two overlap 9.2% by weight.

Contractors, utilities, and a smart-grid book

APAVE tracks the Indxx U.S. Infrastructure Development Index: companies that sell equipment, steel, fasteners, and construction services. Its largest position is Deere, at 3.55%. Nucor, Fastenal, Emerson Electric, and Eaton follow. AIFRA is the cheaper, broader alternative, $4.2 billion at a 0.30% fee against APAVE’s 0.47%. The two funds share 51 stocks. By portfolio weight, they overlap 34%. That is the close pair, and even that pair is not the same trade: AIFRA’s 42% utilities weight is a shock absorber if what you wanted was contractors, and a drag if what you wanted was the buildout.

From August 7 through September 8, Constellation Energy, ONEOK, and Williams offset some of the United Rentals and Quanta drag inside AIFRA. APAVE had no such buffer. It fell 6.6% in that window. Howmet Aerospace, United Rentals, Parker Hannifin, and CRH did the damage. Deere, the top holding, rose 9.6% and added 0.34 percentage points. The same sleeve owned a tractor company that went up and a rental company that went down.

CAIRR is not a APAVE clone with a different fee. It pulls construction, engineering, electrical-equipment, machinery, and bank stocks from the Russell 2500, drops companies that take more than 25% of sales abroad, and caps any issuer at 4%. Community banks outside a list of Midwest manufacturing states are out. The result is $9.4 billion of small- and mid-cap U.S. industrial names at a 0.69% fee. IES Holdings, Kratos Defense, SPX Technologies, and BWX Technologies lead. Pair it with APAVE and the shared weight is 9.3%. From August 7 through September 8, CAIRR fell 11.5% on price; the one-month total return was -11.7%. Karman Holdings, Argan, Kratos, and Dycom Industries each subtracted more than 0.65 percentage points. Those are specialty contractors and a defense name, not NextEra and not Deere. Over three months the fund is down 15.3%, and it sits 20% below its 52-week high.

BGRID concentrates the electrical-equipment trade. It tracks the Nasdaq Clean Edge Smart Grid Infrastructure Index, which classifies companies as pure-play or diversified grid names and assigns 80% of the index to the pure-play sleeve. Schneider Electric is 9.32%, Eaton 8.88%, Johnson Controls 8.42%, ABB 7.88%, Quanta 7.57%. The top 10 are 59% of the fund.

BGRID fell 2.1% over the past month. Eaton, Quanta, and Johnson Controls were the largest drags. Tesla and Oracle, which also sit in the smart-grid index, added a little back. Year to date BGRID is still up 19.0%, ahead of APAVE’s 14.3% and AIFRA’s 13.6%. A broad U.S. equity ETF, ASPY, has returned 12.6%.

The global sleeve is listed asset owners. The iShares Global Infrastructure ETF AIGF, at $10.5 billion, holds Aena at 5.33%; Transurban, the Australian toll-road group, at 5.31%; NextEra, Iberdrola, Enbridge. State Street’s S&P Global Infrastructure ETF AGII overlaps 70% of that weight, with a median holding-size ratio of 1.00: if you already own one, the other is not a second opinion. AIGF has returned 7.7% year to date and 12.3% over one year; AGII is 7.3% and 12.3%. They have been the slow sleeve in 2026 and the stable one over the past month. They also pay. AIGF’s last two semi-annual distributions annualize to a 2.96% trailing yield on Wednesday’s price.

The Northern Trust STOXX Global Broad Infrastructure ETF BNFRA, $3.1 billion, is a broader screen. STOXX selects companies that generate at least half of their revenues from one of 17 sectors it defines as infrastructure, including communications: cable, wireless, wireline, towers, and data centers. SoftBank Group is the largest holding, at 4.34%. Communications are 23% of the fund, almost even with utilities. NextEra still appears. So do Verizon and AT&T. SoftBank at the top of an infrastructure fund is not a data error. It is the methodology. BNFRA is up 11.0% year to date, near its 52-week high.

Digital funds complete the split in one concentrated book. The Global X Data Center & Digital Infrastructure ETF ADTCR is 54% real estate and 39% technology, with Digital Realty, American Tower, and Equinix at 12.8%, 12.5%, and 12.2%; the top 10 names are 71% of the fund. Pacer’s data-and-infrastructure real-estate ETF CSRVR leans harder on the same three landlords and overlaps ADTCR 57% by weight. iShares’ U.S. digital infrastructure fund BIDGT keeps the landlords and adds Arista Networks, Fastly, and Super Micro Computer: same aisle, different mix of rent and silicon. ADTCR is up 35.5% year to date; BIDGT 37.1%. CSRVR, the landlord-heavy version, has returned 10.8%. Over three months ADTCR is down 7.5% and BIDGT 5.8%. Even ADTCR’s latest bounce did not come from the landlords. From August 7 to September 8 the fund rose 0.8%, with Super Micro, SK Hynix, and Micron contributing 0.86, 0.45, and 0.31 percentage points while Digital Realty subtracted 0.29. A data-center ETF can, in a given month, be a memory-chip trade.

Assets and fees are current fund figures; returns are total returns through Wednesday morning, September 9.

Year to date, APAVE and AIFRA are close despite owning different sectors. The one-month return is where the mix showed up. Digital is the full-year outlier, and it is not where the assets are: ADTCR has $2.2 billion after a 36% year, a fraction of APAVE or BGRID. The larger books are still the construction and grid products. Data-center funds led 2026 on price, then gave a piece of that lead back over the past three months.

The 10-year Treasury yield was 4.80% on Tuesday. Owner funds with contracted cash flows get compared to that rate. Contractor funds get compared to backlogs, bid prices, and public-funding calendars. Those are different clocks, and they do not price the same way.