Charter Communications' stock plummeted after a disappointing earnings report and investor concerns regarding the proposed merger with Cox Communications. The company's Spectrum service is experiencing significant subscriber losses, contributing to the largest single-day stock decline in its history. Investors are seemingly skeptical about the potential benefits of the merger and its ability to offset the ongoing subscriber erosion. The combined effect of these factors has created a negative outlook for the telecommunications giant, raising questions about its future strategy and market position.