Does BlackRock (BLK) stock go up or down depending on the month?
BlackRock month by month, year by year
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +4.5% | -5.0% | -9.5% | +10.8% | -1.8% | -8.1% | +13.4% | |||||
| 2025 | +4.9% | -9.1% | -3.2% | -3.4% | +7.2% | +7.1% | +5.4% | +1.9% | +3.4% | -7.1% | -3.3% | +2.2% |
| 2024 | -4.6% | +4.8% | +2.8% | -9.5% | +2.3% | +2.0% | +11.3% | +2.9% | +5.3% | +3.3% | +4.3% | +0.2% |
| 2023 | +7.1% | -9.2% | -2.9% | +0.3% | -2.0% | +5.1% | +6.9% | -5.2% | -7.7% | -5.3% | +22.7% | +8.1% |
| 2022 | -10.1% | -9.6% | +2.7% | -18.3% | +7.1% | -9.0% | +9.9% | -0.4% | -17.4% | +17.4% | +10.9% | -1.0% |
| 2021 | -2.8% | -1.0% | +8.6% | +8.7% | +7.0% | -0.2% | -0.9% | +8.8% | -11.1% | +12.5% | -4.1% | +1.2% |
| 2020 | +4.9% | -12.2% | -5.0% | +14.1% | +5.3% | +2.9% | +5.7% | +3.3% | -5.2% | +6.3% | +16.5% | +3.3% |
| 2019 | +5.7% | +6.8% | -3.6% | +13.5% | -14.4% | +12.9% | -0.3% | -9.6% | +5.5% | +3.6% | +7.2% | +1.6% |
| 2018 | +9.4% | -2.2% | -1.4% | -3.7% | +2.4% | -6.6% | +0.7% | -4.7% | -1.6% | -12.7% | +4.0% | -8.2% |
| 2017 | -1.7% | +3.6% | -1.0% | +0.3% | +6.4% | +3.2% | +1.0% | -1.8% | +6.7% | +5.3% | +6.4% | +2.5% |
| 2016 | -7.7% | -0.7% | +9.2% | +4.6% | +2.1% | -5.9% | +6.9% | +1.8% | -2.8% | -5.9% | +8.7% | +2.6% |
| 2015 | -4.8% | +9.1% | -1.5% | -0.5% | +0.5% | -5.4% | -2.8% | -10.1% | -1.7% | +18.3% | +3.3% | -6.4% |
| 2014 | -5.1% | +1.5% | +3.2% | -4.3% | +1.3% | +4.8% | -4.7% | +8.5% | -0.7% | +3.9% | +5.3% | -0.4% |
| 2013 | +1.5% | +7.1% | +3.7% | +4.8% | -8.0% | +9.8% | -7.7% | +4.0% | +11.2% | +0.6% | +4.5% | |
| Average | -0.0% | -1.6% | +0.4% | +1.2% | +2.0% | -0.4% | +4.5% | -0.9% | -1.8% | +3.9% | +6.3% | +0.8% |
| % of years up | 46% | 43% | 43% | 57% | 79% | 50% | 71% | 46% | 38% | 69% | 85% | 69% |
| Years observed | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 |
BlackRock month by month: the summary
Over 2013-2026, here's what BlackRock (BLK) stock did each month, on average: January -0.0% (up 46% of 13 years), February -1.6% (up 43% of 14 years), March +0.4% (up 43% of 14 years), April +1.2% (up 57% of 14 years), May +2.0% (up 79% of 14 years), June -0.4% (up 50% of 14 years), July +4.5% (up 71% of 14 years), August -0.9% (up 46% of 13 years), September -1.8% (up 38% of 13 years), October +3.9% (up 69% of 13 years), November +6.3% (up 85% of 13 years), December +0.8% (up 69% of 13 years). In other words, BLK historically rose in March, April, May, July, October, November, December, and fell in January, February, June, August, September.
Does BlackRock really go up in November?
Over 2013-2026, November is BlackRock's strongest month: +6.3% on average, positive in 11 of 13 years. At the other end, September shows -1.8%. 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 BlackRock stock go up or down in August?
Over 13 years, BLK fell -0.9% on average in August, finishing the month up 6 times out of 13 (46%). Median: -0.4%. Results are split year to year — there's no clear pattern. ⚠️ 13 years of data is not a prediction.
Does BlackRock stock go up or down in July?
Over 14 years, BLK rose +4.5% on average in July, finishing the month up 10 times out of 14 (71%). Median: +5.5%. It's one of its most consistent months. ⚠️ 14 years of data is not a prediction.
Does BlackRock stock go up or down in October?
Over 13 years, BLK rose +3.9% on average in October, finishing the month up 9 times out of 13 (69%). Median: +3.9%. Results are split year to year — there's no clear pattern. ⚠️ 13 years of data is not a prediction.
Does BlackRock stock go up or down in May?
Over 14 years, BLK rose +2.0% on average in May, finishing the month up 11 times out of 14 (79%). Median: +2.4%. It's one of its most consistent months. ⚠️ 14 years of data is not a prediction.
Does BlackRock stock go up or down in February?
Over 14 years, BLK fell -1.6% on average in February, finishing the month up 6 times out of 14 (43%). Median: -0.8%. Results are split year to year — there's no clear pattern. ⚠️ 14 years of data is not a prediction.
Does BlackRock stock go up or down in April?
Over 14 years, BLK rose +1.2% on average in April, finishing the month up 8 times out of 14 (57%). Median: +0.3%. Results are split year to year — there's no clear pattern. ⚠️ 14 years of data is not a prediction.
What is the best month to buy BlackRock stock?
Historically, November: over the last 14 years, BLK gained +6.3% on average that month and finished up 85% of the time (13 years observed). September is the weakest month (-1.8%). This is not a prediction: 14 years is a small sample, and the past is under no obligation to repeat.
Why does BlackRock stock often rise in November?
November has averaged as its best month over 14 years (+6.3%, up 85% 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 BLK it's November (+6.3% 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 BLK, November is the most consistent month (85% 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 BLK'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.