A guidance cut from Concentrix dragged the sector down and hardened a fear that automated agents are eroding the business of answering the phone.

The fear that artificial intelligence would hollow out the call-centre business has been hanging over the sector for two years, more sentiment than spreadsheet. This week it acquired some numbers.

A weak set of results and a lowered forecast from Concentrix sent its shares tumbling and pulled rival Teleperformance down with it, hardening a view among investors that the industry has become, in the bluntest framing now circulating, uninvestable.

Concentrix supplied the trigger. The California-based outsourcing company cut its full-year 2026 revenue outlook to between $9.93 billion and $10.03 billion, down from a prior range of $10.04 billion to $10.18 billion, a modest trim in absolute terms that landed hard against already nervous expectations.

Its shares fell more than 21% in premarket trading. Teleperformance, the Paris-listed sector leader, dropped around 13% in sympathy, on no news of its own beyond its rival’s.