Does T-Mobile US (TMUS) stock go up or down depending on the month?
T-Mobile US month by month, year by year
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | -2.9% | +10.1% | -3.3% | -6.9% | -4.1% | -10.6% | +3.0% | |||||
| 2025 | +5.5% | +15.8% | -1.1% | -7.4% | -1.9% | -1.6% | +0.1% | +5.7% | -5.0% | -12.3% | -0.5% | -2.9% |
| 2024 | +0.6% | +1.3% | -0.0% | +0.6% | +6.6% | +0.7% | +3.5% | +9.0% | +3.8% | +8.1% | +10.7% | -10.6% |
| 2023 | +6.7% | -4.8% | +1.9% | -0.6% | -4.6% | +1.2% | -0.8% | -1.1% | +2.8% | +2.7% | +4.6% | +6.6% |
| 2022 | -6.7% | +13.9% | +4.2% | -4.1% | +8.2% | +0.9% | +6.3% | +0.6% | -6.8% | +13.0% | -0.1% | -7.6% |
| 2021 | -6.5% | -4.8% | +4.4% | +5.5% | +7.1% | +2.4% | -0.6% | -4.9% | -6.8% | -10.0% | -5.4% | +6.6% |
| 2020 | +1.0% | +13.9% | -6.9% | +4.6% | +13.9% | +4.1% | +3.1% | +8.7% | -2.0% | -4.2% | +21.3% | +1.4% |
| 2019 | +9.4% | +3.7% | -4.3% | +5.6% | +0.6% | +1.0% | +7.5% | -2.1% | +0.9% | +4.9% | -5.0% | -0.2% |
| 2018 | +2.5% | -6.9% | +0.7% | -0.9% | -7.9% | +7.3% | +0.4% | +10.1% | +6.3% | -2.3% | -0.1% | -7.1% |
| 2017 | +8.3% | +0.4% | +3.3% | +4.1% | +0.2% | -10.1% | +1.7% | +4.9% | -4.7% | -3.1% | +2.2% | +4.0% |
| 2016 | +2.6% | -7.6% | +3.2% | +2.6% | +8.9% | +1.2% | +7.1% | +0.0% | +0.8% | +6.4% | +9.0% | +6.1% |
| 2015 | +12.0% | +9.4% | -4.1% | +7.4% | +14.2% | -0.3% | +4.9% | -2.6% | +0.5% | -4.8% | -6.3% | +10.2% |
| 2014 | -9.1% | -0.2% | +8.3% | -11.3% | +17.2% | -2.1% | -2.0% | -8.7% | -4.0% | +1.1% | +0.0% | -7.7% |
| 2013 | -2.3% | +11.2% | +8.6% | -9.5% | +15.8% | -2.8% | -3.2% | +11.2% | +6.8% | -6.2% | +29.3% | |
| Average | +1.8% | +3.0% | +1.3% | +0.6% | +3.5% | +0.7% | +2.2% | +1.3% | -0.2% | +0.5% | +1.9% | +2.2% |
| % of years up | 69% | 57% | 57% | 57% | 64% | 64% | 71% | 46% | 54% | 54% | 38% | 54% |
| Years observed | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 |
T-Mobile US month by month: the summary
Over 2013-2026, here's what T-Mobile US (TMUS) stock did each month, on average: January +1.8% (up 69% of 13 years), February +3.0% (up 57% of 14 years), March +1.3% (up 57% of 14 years), April +0.6% (up 57% of 14 years), May +3.5% (up 64% of 14 years), June +0.7% (up 64% of 14 years), July +2.2% (up 71% of 14 years), August +1.3% (up 46% of 13 years), September -0.2% (up 54% of 13 years), October +0.5% (up 54% of 13 years), November +1.9% (up 38% of 13 years), December +2.2% (up 54% of 13 years). In other words, TMUS historically rose in January, February, March, April, May, June, July, August, October, November, December, and fell in September.
Does T-Mobile US really go up in May?
Over 2013-2026, May is T-Mobile US's strongest month: +3.5% on average, positive in 9 of 14 years. At the other end, September shows -0.2%. But a monthly gap is often built on one or two extreme years — the table above shows it: look at the spread, not just the average. Seasonality only means something when it has a cause (selling season, earnings calendar, year-end tax effects); with no identified cause, it's probably noise.
Frequently asked questions
Does T-Mobile US stock go up or down in July?
Over 14 years, TMUS rose +2.2% on average in July, finishing the month up 10 times out of 14 (71%). Median: +2.3%. It's one of its most consistent months. ⚠️ 14 years of data is not a prediction.
Does T-Mobile US stock go up or down in August?
Over 13 years, TMUS rose +1.3% on average in August, finishing the month up 6 times out of 13 (46%). Median: +0.0%. Results are split year to year — there's no clear pattern. ⚠️ 13 years of data is not a prediction.
Does T-Mobile US stock go up or down in February?
Over 14 years, TMUS rose +3.0% on average in February, finishing the month up 8 times out of 14 (57%). Median: +0.9%. Results are split year to year — there's no clear pattern. ⚠️ 14 years of data is not a prediction.
Does T-Mobile US stock go up or down in December?
Over 13 years, TMUS rose +2.2% on average in December, finishing the month up 7 times out of 13 (54%). Median: +1.4%. Results are split year to year — there's no clear pattern. ⚠️ 13 years of data is not a prediction.
Does T-Mobile US stock go up or down in November?
Over 13 years, TMUS rose +1.9% on average in November, finishing the month up 5 times out of 13 (38%). Median: -0.1%. Results are split year to year — there's no clear pattern. ⚠️ 13 years of data is not a prediction.
Does T-Mobile US stock go up or down in January?
Over 13 years, TMUS rose +1.8% on average in January, finishing the month up 9 times out of 13 (69%). Median: +2.5%. Results are split year to year — there's no clear pattern. ⚠️ 13 years of data is not a prediction.
What is the best month to buy T-Mobile US stock?
Historically, May: over the last 14 years, TMUS gained +3.5% on average that month and finished up 64% of the time (14 years observed). September is the weakest month (-0.2%). This is not a prediction: 14 years is a small sample, and the past is under no obligation to repeat.
Why does T-Mobile US stock often rise in May?
May has averaged as its best month over 14 years (+3.5%, up 64% of years). No clearly established recurring seasonal driver explains this month — it's a statistical tendency over 14 years of history, not a prediction.
Is there a best month to invest in the stock market in general?
There's no universal rule: every stock has its own seasonality. For TMUS it's May (+3.5% on average over 14 years) — another stock will look completely different. The calendar effects people cite ("sell in May", the year-end rally) are market-wide averages, not laws: on TMUS, July is the most consistent month (71% positive years). We also rank all 12 months for the whole market.
Does stock seasonality actually work?
Careful. A month that rose 14 times out of 14 can simply be chance: with 12 months and a dozen years, patterns appear naturally even in random data. Seasonality describes what happened; it doesn't explain why and predicts nothing. Treat it as context, never as a standalone buy signal.
What data is this table based on?
On TMUS's real monthly closing prices from 2013 to 2026 (14 years), source Yahoo Finance. Each cell = the price change over that month. Price performance, excluding dividends. Incomplete months and quote gaps are excluded.