1. Citigroup projects S&P 500 to hit 7,700 by 2026, driven by AI. 2. AI tech investment favors companies adopting AI, distinguishing winners and losers. 3. S&P 500 earnings estimated at $320 for next year, above consensus. 4. JP Morgan forecasts S&P 500 at 7,500, supported by AI-driven economy. 5. Volatility could rise as bull market matures, warns Citigroup.