Will LYTE be the next DRAM? After making a name for itself with the phenomenal storage ETF (DRAM), Roundhill Investments is now placing its next bet on another critical bottleneck in AI infrastructure—optical interconnects. Last night, Roundhill's Photonics and Optics ETF, LYTE, officially launched on the U.S. stock market. Roundhill essentially replicated DRAM's product strategy in the optical communication space: focusing on the core bottlenecks of AI infrastructure, selecting global leaders with highly correlated revenue, and employing active management, quarterly rebalancing, and concentrated holdings. LYTE is a highly concentrated AI optical interconnect portfolio. Its top five holdings are LITE, COHR, Innolight, Accelink Technologies, and CIEN.US, which together account for 73.19%. Following them are HYC, Source Photonics, Hisense Broadband, FN, AAOI, AXTI, and others, with the top ten holdings collectively making up approximately 97.32%. From an industry segmentation perspective: - Lumentum and Coherent primarily focus on lasers and core optical components. - Innolight, Accelink Technologies, and Applied Optoelectronics benefit mainly from upgrades to high-speed optical modules. - HYC, Source Photonics, and Hisense Broadband are involved in optical devices and optical chips. - Ciena provides optical networking equipment, while Fabrinet handles precision manufacturing. Notably, Innolight, Accelink Technologies, HYC, Source Photonics, and Hisense Broadband collectively account for 46.8% of the weight. Roundhill primarily gains exposure through total return swaps, making LYTE one of the few ETFs in the U.S. market with a high allocation to Chinese optical communication leaders. In essence, LYTE is more like a "China-U.S. AI Optical Communication Leaders Portfolio" ETF. LYTE's biggest advantage is that it doesn't try to piece together a seemingly comprehensive "photonics story" with dozens of marginal companies. Instead, it concentrates its weight on the true leaders currently generating AI optical communication revenue and profits. Previously, I reviewed two other ETFs in the optical space: https://(x.com)/qinbafrank/status/2079790771071574469?s=46&t=k6rimWsEbo2D2tXolYcM-A - FOTO focuses on small and mid-sized photonics specialty companies. - LAZR excels in diversified cross-industry allocation. - LYTE, on the other hand, bets heavily on China-U.S. optical communication leaders, offering more direct exposure to AI data center optical interconnects. Personal thoughts: 1) If the core assumption is that orders for AI optical modules, lasers, and optical components will continue to be revised upward in the coming quarters, LYTE might be one of the most direct and high-elasticity tools in the U.S. market for optical interconnect exposure. 2) If the core assumption is a complete systemic revolution of "optics replacing copper/electricity" over the next five years, LYTE's industry chain coverage is still incomplete and cannot fully represent the entire CPO, silicon photonics, and optical I/O investment opportunities.