According to @StockMKTNewz, the best-performing S&P 500 stocks for January 2026 were Sandisk (SNDK) +143%, Moderna (MRNA) +49%, Seagate (STX) +48%, Micron (MU) +45%, Western Digital (WDC) +45%, and Lam Research (LRCX) +36% (source: @StockMKTNewz). This lineup concentrates in memory, data storage, and semiconductor equipment, highlighting relative strength in data-infrastructure plays and momentum leadership across MU, WDC, STX, and LRCX (source: @StockMKTNewz).