Capital discipline, a continuing concern among investors in Alphabet resurfaced as a worry Tuesday when the company said it would pay $32 billion in cash for the private cybersecurity firm Wiz. In early afternoon, Alphabet shares were down 2.8% at $161.91, while the was down 1.1%. The companies didn’t disclose Wiz’s revenue in disclosing the deal and Alphabet didn’t respond to a request for information about that figure.