Comcast surrendered a portion of its recent gains, cooling off after the company unveiled plans to decouple its cable operations from the NBC Universal television and film production empire. The move, aimed at streamlining the business, initially triggered investor enthusiasm before giving way to profit-taking. Despite Thursday's volatility, Netflix provided a bright spot, posting a sharp gain that halted a prolonged period of weakness. Even with this rebound, the streaming giant remains down 15% for the year, underscoring the pressure on content-heavy players to prove their growth narratives in a tightening market.