The Aura AI Photonics ETF (PHOX) has launched on NYSE Arca, becoming one of the first US-listed funds specifically targeting the optical interconnects, silicon photonics, and laser-based transceivers niche. These technologies are identified as a key bottleneck in AI data centers. The new ETF, from the Tidal Trust III series, has an annual operating expense ratio of 0.60% and aims to provide focused exposure to companies that move data using light rather than electrons within the AI infrastructure, a segment often underweighted in broader semiconductor ETFs.