TMUST-Mobile US, Inc.

$148.59-37% 1Y
Latest close: a new 52-week lowOct 9, 2026what changed →

What is the market doing?

Mixed

No clear lean: nothing decisive, though in a downtrend (−22% vs 200-day).

1 to watch, 2 neutral
TrendDowntrendderived · Oct 9, 2026

In a downtrend, below its 50- and 200-day averages. Price is −22% vs its 200-day average.

Insider conviction−$138K (90 days to Oct 8, 2026)SEC EDGAR · Oct 8, 2026

Insiders were net sellers over the 90 days ending Oct 8, 2026; selling is often routine (taxes, diversification).

Short interest1.6% of sharesFINRA · Sep 15, 2026

Lightly shorted, settled Sep 15, 2026, about a week of normal trading to cover. Up 5.7% since the previous count, down from 2.1% of shares outstanding three months ago.

Against the whole market›

Percentile against every name Ryufin tracks. Higher is better; the tick marks the middle of the market. Context, not one of the checks above.

1-year returnbottom 10% of the market
vs 200-day avgbehind 88% of the market

Where this answer is blind. Insider selling is often routine (taxes, diversification); only cluster buying is a strong tell.

How TMUS is trading

T-Mobile US, Inc. is −37% over the past year while the S&P 500 is +18%: 55 points behind the market.

−37%

1-year return · S&P 500 +18%

vs 200-day average
−22%

vs 200-day average · a clear downtrend

RSI (14)
31

RSI (14) · neutral

Below its 52-week high
37%

Below its 52-week high

Sep 17, 2024$148.59 – $266.80 · dashed line: 200-day averageOct 9, 2026
Details›
Last close2026-10-09
$148.59
1 monthS&P 500 +2.7%
−16%
1 yearS&P 500 +18%
−37%
5 yearsS&P 500 +88%
+20%
vs 50-day average$175.06
−15%
52-week high
$235.89
52-week low
$148.59
Annualised volatility
30%
Insider buying, net, 6 monthsForms 3/4/5 to 2026-10-08
−$117K
Calendar-year price return
YearReturn
2026 (year to date)−26%
2025−6.6%
2024+40%
2023+15%
2022+21%
2021−14%
2020+72%
2019+23%
2018+0.16%
2017+10%
Average return by calendar month, 2016–2026
MonthYearsPositiveAverage
Jan107 of 10+1.8%
Feb107 of 10+4.4%
Mar105 of 10−0.12%
Apr105 of 10+0.06%
May106 of 10+1.9%
Jun107 of 10+0.23%
Jul119 of 11+2.7%
Aug116 of 11+2.8%
Sep115 of 11−1.8%
Oct115 of 11−0.50%
Nov105 of 10+3.8%
Dec105 of 10−0.36%

End-of-day closes from IEX; the S&P 500 comparison uses SPY over the same window. Prices are a reference point, not a basis for trading decisions.