Oracle is rapidly expanding its cloud infrastructure.It's been a wild couple of months for Oracle's (ORCL 2.46%) stock investors.Oracle stock surged 36% on Sept. 10 in response to a blockbuster cloud deal with OpenAI and a five-year roadmap that would pole-vault Oracle Cloud Infrastructure (OCI) into one of the top clouds by revenue.But Oracle stock is now trading down around 25% from its 52-week high as investors grow critical of artificial intelligence (AI) spending. Oracle is not alone. Last week, Meta P ...