PreMarket News Roundup Key Themes and Market Context Nvidia Stock Approaches Critical Technical Level Traders Eye Potential Breakout Jim Cramer Comments on ServiceNows NOW Stock Performance Mortgage Rates Mixed 30Year Fixed Declines 15Year Fixed and ARMs Move in Opposite Directions US Productivity Growth Decelerates in Q4 as Unit Labor Costs Rise Robert Half RHI Releases Q1 2026 Earnings Transcript Key Insights Novartis Lifts Annual Sales and Profit Forecast Amid Strong Operational Momentum