Shares of Soitec plunged as much as 11.3% on November 4 after Morgan Stanley downgraded the French semiconductor-materials maker and slashed its price target, puncturing a stock that had been one of Europe's most spectacular performers this year. The sell-off raises a pointed question: has the AI-fueled rally priced in more growth than the company can deliver?
Morgan Stanley Reverses Course Just Months After Doubling Its Target
Morgan Stanley cut Soitec from "overweight" to "market weight" and reduced its price target from €200 to €140.
The stock was also removed from the bank's "preferred list."
The analyst argued that macro headwinds — credit worries, rising oil prices, inflation, and higher interest rates — make it hard for a volatile name like Soitec to outperform. Notably, Morgan Stanley had upgraded Soitec to overweight only in March 2026 with a €70 target , then raised it to €200 by May. The rapid round-trip signals deep uncertainty about how much upside remains.
UBS Says "Buy the Dip" on AI Photonics — but With Caveats On the same day, UBS upgraded Soitec from "sell" to "neutral" and lifted its target from €94 to €130 . UBS now expects Soitec's photonics business — which makes wafers for optical transceivers in AI data centers — to grow 66% annually between fiscal 2026 and 2030, up from 35% previously. However, UBS cautioned its forecasts assume "near-perfect execution," with Soitec holding above 85% market share over time — a high bar in a cyclical industry.
A 570% Rally Built on a Narrow Foundation
From a €24.54 low in February, Soitec more than quadrupled in three months, reaching an all-time high above €200 in May. The driver: a pivot from shrinking smartphone chip sales to AI-linked photonics wafers. But smartphones still account for roughly 30–35% of fiscal 2026 revenue, and UBS expects smartphone unit sales to fall about 10% in 2026 and a further 3% in 2027 , capping the recovery in Soitec's legacy business.
Earnings in Two Weeks Will Be the Real Test
Soitec reports first-half results on November 18.
The consensus 12-month target of roughly €166 still implies about 35% upside , but the range is enormous — from under €40 to €300 — reflecting a market sharply divided on whether photonics can offset the smartphone drag fast enough. With Morgan Stanley stepping aside, the burden of proof shifts squarely to management.