The Motley Fool·2026-01-04 08:45Market Predictions for 2026 - The S&P 500 is expected to deliver single-digit gains in 2026, ending a streak of double-digit gains over the past three years, but no major market sell-off is anticipated due to strong economic and corporate earnings [4][5] - Small- and mid-cap stocks are predicted to outperform larger stocks, with Mirum Pharmaceuticals highlighted as a potential winner after its share price nearly doubled in 2025, and expected positive results from clinical studies in 2026 [6][7][8] - The AI sector is expected to shift from hype to tangible returns, with Alphabet predicted to continue benefiting from its Google Cloud unit and agentic AI technology, which is anticipated to drive growth [9][10][12] - The renewable energy sector is expected to continue its rebound, driven by strong AI growth and increased demand for energy to power data centers, with Brookfield Renewable and Clearway Energy expected to perform well [13][15] - Political dynamics in the mid-term election year are expected to create volatility in the stock market, but once the uncertainty fades, stocks are predicted to move higher, with potential winners in the cannabis industry if Democrats gain control [16][18]