Why is A2 Milk stock tumbling today?

A2 Milk shares plummeted by 10.2% to NZ$7.39 on Monday following the release of its FY26 annual results. The company's net profit attributable to shareholders declined by 44% to NZ$113.6 million for the year ended June 30, 2026, falling short of market expectations. The main driver behind the decrease was a 14% drop in revenue from China-label infant milk formula to NZ$544.3 million.

This decline was attributed to supply chain disruptions stemming from unexpectedly high demand in the third quarter, a production backlog, and increased freight costs that squeezed margins. The setback was particularly surprising given the optimism surrounding A2 Milk's first-half FY26 results in February, when revenue grew by 18.8% and management raised full-year guidance, setting the company on a path to achieve its NZ$2 billion sales target a year early.

Analyst sentiment had already become more cautious ahead of the results. The broader market sentiment had been volatile, with the NZX 50 experiencing sporadic selling pressure in recent weeks, while global markets showed little respite, with U.S. indices remaining flat for the day. The Reserve Bank of New Zealand's cautious monetary policy continued to dampen growth-oriented consumer stocks listed on the exchange.

A2 Milk's heavy dependence on the Chinese infant formula market, a sector grappling with persistent structural challenges, was identified as a significant vulnerability by analysts.