Shares of European chipmaker X-FAB surged on Wednesday after retail buying tied to a viral social media post, in the latest sign of speculative trading in semiconductor stocks.
The Paris-listed stock rose as much as 76%, briefly valuing the company at about 2.06 billion euros ($2.40 billion), a record high. It later trimmed gains but was up 38% by 1322 GMT, taking this year's total gains to 141%.