Stock of X-Fab Silicon Foundries SE (OTC:XFABF) rose 55.6% on Wednesday following a post by the Serenity social media account, which analyses AI and semiconductor supply chains.
The post highlighted X‑Fab’s exposure to power semiconductors and silicon photonics, citing government support of €128 million from the EU CHIPS Act and $50 million from the US CHIPS Act.
X‑Fab operates three mature‑node fabs in Germany, runs its silicon photonics business under the brand “photonixFAB,” and has a market capitalisation of approximately $1.78 billion, reflecting a 200 % increase over the past six months.
The price‑to‑book ratio was noted at about 1.29, suggesting the stock may be undervalued.
The surge is attributed mainly to retail investor interest triggered by the social media commentary rather than any new corporate financial results or disclosures.
