Alphabet Inc.

Berkshire Hathaway Inc.

NVIDIA Corporation

The first shutdown in years has begun in the USA: the publication of macroeconomic statistics has been halted, and civil servants have been sent on forced leave en masse. Berkshire Hathaway is preparing to buy OxyChem for $10 billion - one of the largest in recent years. Nvidia broke a record, raising its capitalization above $4.5 trillion thanks to deals with OpenAI and growing spending on AI infrastructure. These and other topics are in our review of the key events for the morning of October 1.