Comcast shares are under mild pressure in extended trading following a report released after yesterday's market close that highlighted the company's significant recent underperformance. The stock has faced a difficult month, dropping 18.12% as investors weigh the operational and balance sheet uncertainty surrounding the company's planned business separation. This negative sentiment is compounded by upcoming earnings expectations for October 22, which currently project a 12.5% decline in EPS and a 5.92% decrease in revenue year-over-year.