Alphabet lost roughly $270 billion in market value in a single trading session. The June 2026 sell-off, driven by mounting concerns about Alphabet’s competitive positioning against OpenAI and Anthropic, sent the company’s shares tumbling approximately 7%.
The contagion spreads
The Nasdaq Composite and the Philadelphia Semiconductor Index both posted multi-percent declines in the same stretch. The damage wasn’t contained to US markets, either. Asian semiconductor giants Samsung and SK Hynix took hits as the sell-off rippled across time zones.
Wall Street estimates that corporate debt and capital expenditures tied to AI infrastructure have been trending around $270 billion — roughly equal to the total market cap loss Alphabet suffered in one day.
The talent drain problem
