IBM plans to invest $10B over 5 years to accelerate its quantum roadmap and build a fault-tolerant system by 2029.

IBM stock added to a big recent rally after analysts with Barclays said the company's software shift and quantum push make it a buy.

Barclays initiated IBM with overweight rating and $350 target, saying its infrastructure software is immune to AI disruption. Stock up 30% in May on quantum commitments.