Shares of cybersecurity software companies tumbled Friday after Anthropic PBC introduced a new security feature into its Claude AI model.Crowdstrike Holdings was the among the biggest decliners, falling as much as 7.9%, while Cloudflare Inc. slumped more than 7%. Meanwhile, Zscaler dropped as much as 4%, SailPoint shed 8.6%, and Okta declined as much as 9.6%. The Global X Cybersecurity ETF fell as much as 4.6%, extending its losses on the year to 15.6%....