The S&P 500's 3 Best-Performing Stocks So Far in 2026

NAND flash memory chip on a high-performance PCIe storage card with glowing circuitry, symbolizing the AI-driven data storage boom. Key Points Despite a broad market selloff, SNDK, TPL, and MRNA stand out as the S&P 500's 3 best-performing stocks in 2026, each operating in a different sector. SanDisk leads with a greater than 160% YTD gain, fueled by a global NAND flash shortage and surging AI demand. Moderna has gained over 80% on pipeline optimism and positive data, though analysts maintain a consens ...