Marathon Fusion’s October 21 announcement of a “high-rate alchemy” experiment—converting mercury-198 into stable gold-197 via deuterium-tritium fusion neutrons at roughly ten times CERN’s prior record—drives current trader attention. The San Francisco startup shared a gamma spectrum but released no quantitative yield data, mass measurements, or independent verification, leaving the result unconfirmed against its 2025 arXiv preprint that modeled ~2 tonnes of gold per gigawatt-thermal annually through (n,2n) multiplication reactions in a fusion blanket. Traders weigh the technical feasibility of scaling neutron-driven transmutation without compromising tritium breeding against the absence of peer review, public datasets, or third-party replication. Key near-term catalysts include Marathon’s planned San Francisco reactor build, potential isotope-enrichment updates, and any qualifying experiments that could meet market-resolution criteria by late 2026 or mid-2027.