May 8 : Cloudflare shares tumbled more than 15 per cent in premarket trading on Friday, after its quarterly revenue forecast disappointed investors who had bet the stock would be a major beneficiary in the race to adopt artificial intelligence. The networking and cybersecurity services provider will also lay off about 20 per cent of staff due to greater use of AI tools, a move that Jefferies said could hurt near-term growth. Following a 43 per cent rally since its last quarterly results in