BERLIN Rapid advances in artificial intelligence tools are roiling global markets and raising concerns about the future of companies in the software-as-a-service (SaaS) sector, as investors react to a wave of new autonomous products. Market anxiety over what some analysts dubbed a “SaaS-pocalypse” intensified this month after a series of product releases by US firm Anthropic, contributing to steep losses in the software sector. The iShares Expanded Tech-Software Sector ETF (IGV), which tracks