Sandisk, Deckers, Apple Stocks Surge on Q4 Earnings Beats as Tech Leads Market Rally

SanDisk (SNDK), Deckers (DECK), and Apple (AAPL) shares jumped after all three posted stronger-than-expected Q4 earnings, fueling optimism as 13% of S&P 500 firms have reported results by January 23, 2026. Analysts now project 8.2% EPS growth for the quarter — marking a potential tenth straight quarter of year-over-year earnings expansion. Wall Street had initially forecast 8.3% growth, down from Q3’s 13.6%, but revised estimates upward in recent months, particularly for tech. This earnings season tests whether market breadth can sustain beyond Big Tech, even as AI, Trump-era policies, and K-shaped consumer trends remain dominant themes. Reports from Microsoft (MSFT), Meta (META), Tesla (TSLA), UnitedHealth (UNH), Boeing (BA), and others are also shaping investor sentiment.