A Sharp Selloff Changed the Price, Not Yet the Cash Flow
T-Mobile US, Inc. (NASDAQ:TMUS) fell 13.2% on October 9 after SpaceX announced an approximately $8 billion agreement to acquire nationwide 800 MHz spectrum licenses. The selloff raises a valuation question: how much should investors discount a carrier generating substantial recurring cash flow for competition that could take years to materialize?
The low-band spectrum strengthens Starlink Mobile’s ambitions, but regulatory approval and significant infrastructure investment remain obstacles. JPMorgan consequently saw limited immediate competitive risk, despite acknowledging SpaceX’s longer-term potential.
T-Mobile ranks fifth among the 10 best undervalued stocks to buy now according to Reddit. Which of the four companies attracted greater hedge fund interest, and how does T-Mobile’s cash generation compare?
A Cash Generator Facing Two Competitive Tests
T-Mobile US, Inc. was delivering stronger operating results before the announcement. In Q2 2026, postpaid service revenue increased 13%, total service revenue grew 9%, and core adjusted EBITDA rose 12%. Average revenue per postpaid account climbed 2% to $152.91, supporting profitability despite an increasingly competitive wireless market.
Management also raised its 2026 adjusted free cash flow guidance to $18.4 billion–$18.8 billion from $18.1 billion–$18.7 billion, citing tax efficiencies and working capital improvements.
More immediate pressure comes from existing competitors. T-Mobile expects approximately 250,000 net postpaid account additions in Q3, below the roughly 304,000 anticipated by analysts, according to Reuters. Although premium-plan migrations could lift revenue per account, higher prices may also increase churn as AT&T and Verizon compete for subscribers.
Operational efficiency could help offset those pressures. Our examination of T-Mobile’s AutoPilot and Dynamic CX initiatives explores whether AI-powered network management can improve margins without proportionately higher spending.
Can Earnings Growth Justify the Valuation?
At the $18.6 billion midpoint of its adjusted free cash flow guidance, T-Mobile US, Inc. has considerable financial flexibility to invest in its network and return capital to shareholders. The valuation question is whether that cash generation remains resilient as competition intensifies.
According to Seeking Alpha, T-Mobile trades at 16.54 times trailing GAAP earnings and 14.40 times forward GAAP earnings, compared with sector medians of 16.26 and 14.51 times, respectively. Its forward non-GAAP P/E of 12.74 times is similarly close to the sector median of 12.52 times but substantially below its five-year average of 28.50 times. While that historical discount suggests multiple compression, it does not necessarily indicate undervaluation without sustainable earnings growth.
Consensus estimates compiled by Seeking Alpha project EPS growth of 12.71% in 2026, accelerating to 27.00% in 2027, followed by 24.86% in 2028 and 23.61% in 2029. The implied P/E declines to 11.34 times 2027 earnings and 7.35 times 2029 earnings. Those projections could make the shares appear inexpensive, provided operating leverage and subscriber profitability remain intact.
The risk is that higher retention spending, weaker customer additions, or slower revenue growth per account could undermine those expectations. SpaceX adds longer-term uncertainty, although T-Mobile’s established infrastructure and subscriber base present significant barriers to entry.
SpaceX faces its own financial hurdles in challenging established carriers. Beyond acquiring spectrum, developing a competitive wireless network could require substantial additional investment. Whether those ambitions can generate returns commensurate with SpaceX’s $2.2 trillion valuation remains uncertain. Our analysis of SpaceX’s valuation and its challenge to telecom giants examines the financial implications of that expansion.
Analysts remain divided. Bernstein lowered its price target to $180 from $220 on October 13 while maintaining Market Perform, citing satellite competition and pricing pressure. Raymond James upgraded the stock to Outperform with a $170 target on October 12, arguing that substantial disruption could remain years away. Scotiabank maintained Outperform but reduced its target to $212 from $217.
Subscriber Economics Will Determine the Outcome
Insider Monkey tracked 85 hedge funds holding T-Mobile US, Inc. in Q2 2026, unchanged from Q1. Short interest declined to 14.32 million shares as of September 30 from 17.09 million in August, representing 3.00% of the float. Both snapshots predate the SpaceX announcement and offer limited insight into subsequent positioning.
Near-term valuation will depend on subscriber additions, churn, revenue per account, and free cash flow. SpaceX’s competitive significance, meanwhile, depends on its ability to translate spectrum ownership into commercially viable wireless services.
Ultimately, the October selloff repriced a potential competitive threat before measurable financial damage emerged. Whether that discount proves justified will depend on T-Mobile’s ability to sustain earnings and cash generation as the wireless market evolves.
READ NEXT: AT&T (T) Got Hit by a SpaceX Scare. Is Its Moat Really Cracking? and Verizon (VZ) Keeps Raising Guidance. Is SpaceX Worth the 8x Discount?
Hedge Fund Resource Center