Active, Index, Private or Leveraged: How Photonics ETFs Really Differ

On the surface, every photonics ETF sells the same story: light is replacing copper inside AI data centers. Look under the hood, though, and the 7 funds we track are built in very different ways. Those differences can matter as much as the theme itself.

1. Index vs. active management

$PHOX is the index option. It tracks the VettaFi AI Photonics Index, so its holdings follow published rules and change on a schedule. Most of the others, including $FOTO, $LYTE, $LAZR, $LUMA and $EUV, are actively managed. A manager can add, drop or resize positions whenever they want.

Active management lets a fund react quickly in a fast-moving theme. The trade-off is that what you own today might not be what you own next month, so check holdings more often.

2. Pure optics vs. the wider chip supply chain

Most photonics ETFs center on optical networking: transceivers, lasers and optical components for AI data centers. $EUV takes a wider angle built around lithography, the light-based process used to print chips. That pulls in big equipment makers and foundries. It is still a photonics story, but it behaves more like a chip-equipment fund.

3. Private companies and swaps

Two funds stand out for what they are allowed to own. $LUMA can invest in private companies, IPOs and derivatives. $LAZR has held a position in privately held Anthropic. Private holdings can add access you cannot get elsewhere, but they are valued with models instead of market prices and cannot be sold as easily.

$FOTO gets part of its exposure through total return swaps and holds cash and Treasury bills alongside them. That is a common way for a new fund to build exposure, but it means the holdings list will not look like a simple list of stocks.

4. Leverage

$EUVX is a 2x daily leveraged version of the lithography strategy. It is designed to double the daily move, up or down. Over longer periods, daily resets can make returns drift far away from 2x, especially when markets are choppy. For most investors this is a trading tool, not a long-term holding.

5. Fees and size

Costs range from 0.35% for $EUV to 1.00% for $LUMA. Size ranges widely too, from $343M in $LYTE down to funds with only a few million dollars in assets. Very small funds can have wider bid-ask spreads and a higher chance of closing if they never attract assets.

The bottom line

Two photonics ETFs can share a theme and still give you very different results. Before you buy, check how the fund is run, what it is allowed to own, whether it uses leverage, and what it costs. Then compare it side by side with the alternatives in our comparison pages. None of this is investment advice.