Where Are Comcast and Charter's Internet Customers Going? Here.

Comcast lost 65,000 high-speed internet subscribers last quarter, while Charter shed 117,000 residential broadband customers, extending a trend in which both companies' internet bases peaked in 2023 and have since fallen by more than 1 million subscribers. The article argues that fixed wireless access from T-Mobile and Verizon is now a material competitive threat, with the two wireless carriers serving 15.5 million FWA customers. The revenue mix impact is meaningful because internet service accounts for roughly 20% of Comcast revenue and about 40% of Charter revenue.

Analysis

The key second-order effect is not just churn at the cable names; it is the re-rating of broadband from a quasi-utility to a contestable service with much lower switching friction than the market has assumed. Fixed wireless access converts the last-mile bottleneck from a physical infrastructure moat into a spectrum-and-capacity problem, which is far easier to scale quickly and much harder for cable operators to defend with pricing alone. That raises the probability that cable EBITDA margin compression persists for multiple quarters, because each lost subscriber is disproportionately high-quality revenue and tends to be sticky once households test an acceptable substitute.

For Comcast and Charter, the bigger risk is that the damage compounds through capital allocation. If broadband growth stays negative, managements are forced to choose between maintaining buybacks/dividends and funding network upgrades, which can widen the valuation gap versus wireless peers that are gaining share without equivalent legacy drag. The market may still be underestimating how much of this is a years-long share shift rather than a temporary promotional cycle; the current FWA installed base suggests the addressable pool is still large enough for several more quarters of visible losses.

The likely winners are the carriers with underappreciated wallet-share expansion from home internet, not just the obvious telecom beneficiaries. FWA also has a hidden advantage: it improves retention for mobile customers by bundling another core household bill, which should lower churn and support lifetime value. The contrarian angle is that wireless capacity and service quality can become the limiting factor; if usage growth outpaces network densification, pricing discipline could break and the FWA economics deteriorate faster than expected.

Key Decisions for Investors

• Short CHTR versus long VZ in a 3-6 month pair trade: the market is more exposed to broadband erosion at Charter given its heavier revenue mix; use a 1:1 notional structure and cover if CHTR stabilizes net adds for two consecutive quarters.
• Add a tactical short CMCSA position on any post-earnings bounce, targeting a 2-4 month horizon; risk/reward is favorable if broadband losses remain in the high five-figure range and EBITDA guidance starts to reset lower.
• Initiate a call spread in TMUS or VZ on a 6-12 month horizon to express continued FWA share gains while capping premium outlay; the bull case is multi-quarter subscriber migration, the main risk is capacity-driven ARPU pressure.
• Avoid bottom-fishing cable until there is evidence of broadband net adds inflecting; if long-only exposure is required, prefer a hedged structure: long CMCSA/CHTR only against an equal or larger short in TMUS/VZ to isolate valuation mean reversion rather than direction.
• Watch for a margin-revision catalyst in the next 1-2 earnings cycles; if cable EBITDA estimates roll over again, increase shorts by 25-30% as the street will likely be forced to price in a longer-duration share loss.