Does Comcast (CMCSA) stock go up or down depending on the month?
Comcast month by month, year by year
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +6.2% | +4.1% | -7.3% | -5.8% | -8.0% | -1.3% | -2.4% | |||||
| 2025 | -10.3% | +6.6% | +2.8% | -7.3% | +1.1% | +3.2% | -6.9% | +2.2% | -7.5% | -11.4% | -4.1% | +12.0% |
| 2024 | +6.1% | -7.9% | +1.2% | -12.1% | +5.0% | -2.2% | +5.4% | -4.1% | +5.6% | +4.5% | -1.1% | -13.1% |
| 2023 | +12.5% | -5.5% | +2.0% | +9.1% | -4.9% | +5.6% | +8.9% | +3.3% | -5.2% | -6.9% | +1.4% | +4.7% |
| 2022 | -0.7% | -6.5% | +0.1% | -15.1% | +11.4% | -11.4% | -4.4% | -3.5% | -19.0% | +8.2% | +15.4% | -4.6% |
| 2021 | -5.4% | +6.3% | +2.6% | +3.8% | +2.1% | -0.6% | +3.2% | +3.1% | -7.8% | -8.1% | -2.8% | +0.7% |
| 2020 | -4.0% | -6.4% | -15.0% | +9.5% | +5.2% | -1.6% | +9.8% | +4.7% | +3.2% | -8.7% | +18.9% | +4.3% |
| 2019 | +7.4% | +5.7% | +3.4% | +8.9% | -5.8% | +3.1% | +2.1% | +2.5% | +1.9% | -0.6% | -1.5% | +1.9% |
| 2018 | +6.2% | -14.9% | -5.7% | -8.1% | -0.7% | +5.2% | +9.0% | +3.4% | -4.3% | +7.7% | +2.3% | -12.7% |
| 2017 | +9.2% | -0.8% | +0.5% | +4.3% | +6.4% | -6.6% | +3.9% | +0.4% | -5.3% | -6.4% | +4.2% | +6.7% |
| 2016 | -1.2% | +3.6% | +5.8% | -0.5% | +4.2% | +3.0% | +3.1% | -3.0% | +1.7% | -6.8% | +12.4% | -0.6% |
| 2015 | -8.4% | +11.7% | -4.9% | +2.3% | +1.2% | +2.9% | +3.8% | -9.7% | +0.9% | +10.1% | -2.8% | -7.3% |
| 2014 | +4.8% | -5.1% | -3.2% | +3.4% | +0.9% | +2.8% | +0.1% | +1.8% | -1.7% | +2.9% | +3.0% | +1.7% |
| 2013 | +4.5% | +5.5% | -1.6% | -2.7% | +3.9% | +8.0% | -6.6% | +7.2% | +5.5% | +4.8% | +4.2% | |
| Average | +1.7% | -0.3% | -0.9% | -0.7% | +1.1% | +0.4% | +3.1% | -0.4% | -2.3% | -0.7% | +3.9% | -0.2% |
| % of years up | 54% | 50% | 64% | 50% | 64% | 57% | 79% | 62% | 46% | 46% | 62% | 62% |
| Years observed | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 |
Comcast month by month: the summary
Over 2013-2026, here's what Comcast (CMCSA) stock did each month, on average: January +1.7% (up 54% of 13 years), February -0.3% (up 50% of 14 years), March -0.9% (up 64% of 14 years), April -0.7% (up 50% of 14 years), May +1.1% (up 64% of 14 years), June +0.4% (up 57% of 14 years), July +3.1% (up 79% of 14 years), August -0.4% (up 62% of 13 years), September -2.3% (up 46% of 13 years), October -0.7% (up 46% of 13 years), November +3.9% (up 62% of 13 years), December -0.2% (up 62% of 13 years). In other words, CMCSA historically rose in January, May, June, July, November, and fell in February, March, April, August, September, October, December.
Does Comcast really go up in November?
Over 2013-2026, November is Comcast's strongest month: +3.9% on average, positive in 8 of 13 years. At the other end, September shows -2.3%. 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 Comcast stock go up or down in July?
Over 14 years, CMCSA rose +3.1% on average in July, finishing the month up 11 times out of 14 (79%). Median: +3.5%. It's one of its most consistent months. ⚠️ 14 years of data is not a prediction.
Does Comcast stock go up or down in August?
Over 13 years, CMCSA fell -0.4% on average in August, finishing the month up 8 times out of 13 (62%). Median: +1.8%. Results are split year to year — there's no clear pattern. ⚠️ 13 years of data is not a prediction.
Does Comcast stock go up or down in January?
Over 13 years, CMCSA rose +1.7% on average in January, finishing the month up 7 times out of 13 (54%). Median: +4.8%. Results are split year to year — there's no clear pattern. ⚠️ 13 years of data is not a prediction.
Does Comcast stock go up or down in May?
Over 14 years, CMCSA rose +1.1% on average in May, finishing the month up 9 times out of 14 (64%). Median: +1.1%. Results are split year to year — there's no clear pattern. ⚠️ 14 years of data is not a prediction.
Does Comcast stock go up or down in March?
Over 14 years, CMCSA fell -0.9% on average in March, finishing the month up 9 times out of 14 (64%). Median: +0.8%. Results are split year to year — there's no clear pattern. ⚠️ 14 years of data is not a prediction.
Does Comcast stock go up or down in October?
Over 13 years, CMCSA fell -0.7% on average in October, finishing the month up 6 times out of 13 (46%). Median: -0.6%. 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 Comcast stock?
Historically, November: over the last 14 years, CMCSA gained +3.9% on average that month and finished up 62% of the time (13 years observed). September is the weakest month (-2.3%). This is not a prediction: 14 years is a small sample, and the past is under no obligation to repeat.
Why does Comcast stock often rise in November?
November has averaged as its best month over 14 years (+3.9%, up 62% 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 CMCSA it's November (+3.9% 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 CMCSA, July is the most consistent month (79% 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 CMCSA'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.