NEW YORK (AP) — Wall Street is drifting to begin a holiday-shortened week, hanging near its highest level in three months. The S&P 500 was little changed early Monday, coming off its third straight winning week. The Dow was also flat, and the Nasdaq composite was up 0.3%. Microsoft rose 1.1% after bringing on Sam Altman for a new venture following his sudden dismissal as CEO of OpenAI, the maker of ChatGPT. Microsoft will also continue its partnership with OpenAI. Fervor around artificial-intelligence technology continues to dominate Wall Street. This week is light on economic reports. THIS IS A BREAKING…