Microsoft Stock Set for Biggest Quarterly Gain in 28 Years on AI Strength

The story so far

3 publishers have covered this in 3 articles since 29 Sept 2026. MarketWatch published first, on 29 September at 21:18 UTC; Bloomberg Technology followed 36h 01m later. The most recent article, from Quartz, appeared on 1 October at 11:50 UTC.

Outlets reporting it: Bloomberg Technology (major outlet), MarketWatch, Quartz.

3 prediction markets price this story:

• Will Microsoft have the best AI model at the end of November 2026? — the market puts it at 0%, with $3k traded in the last 24 hours, closing 1 Dec 2026. The market resolves to Yes if Microsoft owns the model with the highest rank on the arena.ai Text Arena leaderboard at 12:00 PM ET on November 30, 2026. The ranking uses the Overall leaderboard with style control off and excludes any models marked as AutoEval. Readers often mistake the source of truth for general industry reports or ignore the specific requirement to check the leaderboard at the exact deadline time.
• Will Microsoft have the best AI model at the end of December 2026? — the market puts it at 0%, with $17k traded in the last 24 hours, closing 31 Dec 2026. The market resolves by checking the Chatbot Arena LLM Leaderboard at 12:00 PM ET on December 31, 2026. The outcome is Yes if Microsoft owns the model with the highest rank; otherwise, it is No. Readers often mistake the deadline for midnight or assume any public ranking counts instead of this specific leaderboard.
• Will Microsoft be the largest company in the world by market cap on December 31? — the market puts it at 0%, with $5k traded in the last 24 hours, closing 1 Jan 2027. Microsoft must hold the highest global market capitalization at the exact moment the stock market closes on December 31, 2026. The final ranking depends on verified financial data from trusted news sources rather than real-time fluctuations. Readers often mistake the date of the linked article for the resolution deadline.

Odds are the market's probability that the outcome happens, updated every few minutes. They are information about what traders expect, not a forecast we make and not investment advice.