Amazon gains after source points to talks for $10 bln OpenAI investment

** Shares of Amazon.com AMZN rise 1.4% to $225.68 premarket after reports co could invest in ChatGPT-maker OpenAI

** Co may invest about $10 billion in OpenAI, in a potential deal could value OpenAI at more than $500 bln, a source familiar with the matter said

** However, talks are "very fluid", the source said, hours after The Information reported it initially

** The move underscores AI sector's endless demand for computing power; OpenAI had signed $38 bln cloud deal with Amazon last month

** OpenAI also preparing IPO that could value firm at up to $1 trillion; Microsoft MSFT holds 27% stake and exclusive rights to sell OpenAI models

** Firms such as Nvidia NVDA and Oracle (ORCL.O) have also signed deals with OpenAI this year, that have helped boost stock performance

** AMZN stock up just 1.4% YTD, as of last close