ServiceNow Inc NOW Undervalued AI Play Poised for Upside Amid Sector Rotation Volatility Communication Services Select Sector SPDR XLC Rallies 14 Amid Broad Market Gains Geopolitical Deescalation and Q1 Earnings Beats Norfolk Southern Corporation NSC Q1 2026 Earnings Dip On Winter Headwinds But Underlying Operational Momentum Signals Bullish Upside