A new thematic exchange-traded fund aimed at the picks-and-shovels layer of artificial intelligence infrastructure has arrived. The Aura AI Photonics ETF (NYSEARCA:PHOX) is listed on NYSE Arca and comes with a prospectus dated July 29, 2026. Its investment adviser is Tidal Investments LLC, with Aura ETFs Inc. serving as fund sponsor.
The fund carries a total annual operating expense ratio of 0.60%, which works out to about $60 a year on a $10,000 investment. That fee is structured as a unitary management charge, with the adviser paying most other fund expenses out of it. Distribution (12b-1) fees are listed at 0.00%, and other expenses at 0.00%, according to the prospectus fee table.
What the Fund Does
PHOX is a passively managed ETF, meaning it tries to mirror an index rather than have a manager pick stocks. Its investment objective is to track the performance, before fees and expenses, of the VettaFi AI Photonics Index. The index is built and maintained by VettaFi LLC, which is not affiliated with Aura or Tidal.
Photonics, in plain terms, is the technology of moving and processing information using light instead of electricity. As AI data centers push more traffic between chips and servers, optical components (lasers, transceivers, specialized wafers, and photonic integrated circuits) have become a bottleneck the industry is racing to expand. The index is designed to track global equity securities of companies listed on major country exchanges which are materially or principally engaged in the generation, transmission, and processing of data using light-based signaling for artificial intelligence computing. Holdings may include ordinary shares and American Depositary Receipts.
The methodology is rules-based. To qualify, a company must have a market capitalization of at least $100 million ($80 million for current constituents), a minimum free float of 20%, a three-month average daily traded value of at least $1 million, and have traded on at least 22 days during the three-month period prior to and including the selection date. The index then holds the 25 highest-ranked eligible securities, ranked first by engagement classification (principally engaged before materially engaged) and then, within each engagement classification, by market capitalization. Rebalancing and reconstitution occur quarterly, generally on the third Wednesday of January, April, July, and October.
The fund is also non-diversified, which means it can put a larger portion of assets into a smaller number of names than a diversified fund. Day-to-day portfolio management is handled by Kimberly Chan and Andy Hicks, both portfolio managers at the adviser since the fund’s inception in 2026.
Why It Exists and How It Stacks Up
The prospectus frames PHOX around a specific slice of AI hardware: the components that let light do the heavy lifting inside data centers, spanning raw chemistry and materials (exotic compounds like Indium Phosphide), micro-optics such as laser diodes and photodetectors, and the specialized semiconductor chips that bridge the electrical and optical worlds, including Optical Digital Signal Processors. The pitch is that photonics is a distinct sub-theme within AI infrastructure, separate from GPUs or broad semiconductor baskets.
PHOX is not the only fund chasing this niche. Other issuers, including KraneShares and Roundhill, have filed prospectuses for photonics-focused ETFs in 2026. Expense ratios on newly filed peers in the space run from roughly 0.75% to 1.00% based on fee tables in their filings, which puts PHOX’s 0.60% at the lower end of that cohort. Tidal Investments is an established ETF platform that acts as adviser to a wide range of third-party sponsored funds under the Tidal Trust umbrella, while Aura ETFs is a newer sponsor brand.
Who It Might Suit, and the Risks
The fund is designed for investors who want targeted exposure to the optical layer of the AI buildout rather than a broad technology index. Because the portfolio is capped at 25 securities and is non-diversified, single-stock moves can swing the fund more than a diversified sector ETF. Global exposure through ADRs also introduces currency and foreign-market risk.
Standard new-fund caveats apply. PHOX has no performance history, and newly launched ETFs often start with modest assets and wider bid-ask spreads until trading volume builds. Funds that fail to gather assets sometimes close. Thematic AI funds also carry hype-cycle risk: sentiment about the space can shift faster than the underlying businesses. What to watch from here is straightforward: how quickly assets accumulate, how tightly the fund tracks the VettaFi AI Photonics Index, and how the photonics theme performs against broader AI benchmarks in its first year of trading.
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