Charter Communications and SLB are bracing for significant stock volatility ahead of their earnings reports, with Charter's shares expected to move up to 12%. Charter faces persistent broadband weakness and a projected 1.77% decline in Q2 revenue to $13.52 billion. While analysts revised estimates downward, earnings per share are still expected to grow by 10.78% to $10.17. To manage its high debt-to-equity ratio of 5.91, the company launched a debt exchange offer on July 23.