Cyngn Inc CYN Faces Modest Decline Amid Support Test Near 136 Navan Inc NAVN Surges 339 as Stock Breaks Above Key Support Levels Nuveen Select Maturities Municipal Fund NIM Holds Steady Near 934 Amid Modest Gains Oceaneering International OII Slips 140 as Support Test Looms Rivian RIVN Shows Modest Uptick as Stock Tests Key Resistance Zone Texas Capital Bancshares Holds Steady Near 100 Amid Consolidation TCBI Viking Therapeutics VKTX Edges Higher as Shares Test Key Resistance Level