Does BlackLine Systems, Inc. (BL) stock go up or down depending on the month?
BlackLine Systems, Inc. month by month, year by year
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | -16.0% | -24.1% | +5.0% | -15.5% | -5.9% | -4.5% | +11.9% | |||||
| 2025 | +5.1% | -24.4% | +0.2% | -2.5% | +18.4% | +1.2% | -5.0% | +1.1% | -2.3% | +7.8% | -0.5% | -3.0% |
| 2024 | -6.0% | -3.3% | +13.8% | -10.1% | -17.8% | +1.5% | -1.9% | +4.3% | +11.3% | +0.4% | +12.0% | -2.0% |
| 2023 | +6.7% | -4.8% | -1.8% | -17.0% | -6.5% | +3.4% | +7.9% | +3.4% | -7.6% | -11.5% | +17.8% | +7.9% |
| 2022 | -11.3% | -18.0% | -2.8% | -8.4% | +9.2% | -9.0% | -5.1% | +7.5% | -11.8% | -6.5% | +20.9% | -0.6% |
| 2021 | -2.8% | -4.3% | -12.6% | +7.1% | -10.4% | +7.0% | +2.8% | -4.6% | +8.2% | +7.5% | -13.3% | -5.9% |
| 2020 | +18.6% | +2.3% | -15.9% | +15.5% | +22.3% | +11.6% | +7.2% | -1.7% | +2.6% | +9.0% | +25.8% | +8.5% |
| 2019 | +16.2% | +10.0% | -11.5% | +10.3% | +0.6% | +4.1% | -16.7% | +14.2% | -6.1% | -2.2% | +15.1% | -4.2% |
| 2018 | +1.3% | +32.4% | -10.9% | +5.6% | +0.5% | +4.3% | -1.7% | +23.6% | +7.0% | -17.9% | -7.6% | -4.5% |
| 2017 | -1.6% | +5.0% | +4.3% | +10.5% | +2.7% | +5.9% | +8.5% | -20.4% | +10.5% | +4.1% | +3.2% | -10.6% |
| 2016 | +18.4% | +2.6% | ||||||||||
| Average | +1.0% | -2.9% | -3.2% | -0.5% | +1.3% | +2.5% | +0.8% | +3.0% | +1.3% | -1.0% | +9.2% | -1.2% |
| % of years up | 50% | 40% | 40% | 50% | 60% | 80% | 50% | 67% | 56% | 56% | 70% | 30% |
| Years observed | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 10 | 10 |
BlackLine Systems, Inc. month by month: the summary
Over 2016-2026, here's what BlackLine Systems, Inc. (BL) stock did each month, on average: January +1.0% (up 50% of 10 years), February -2.9% (up 40% of 10 years), March -3.2% (up 40% of 10 years), April -0.5% (up 50% of 10 years), May +1.3% (up 60% of 10 years), June +2.5% (up 80% of 10 years), July +0.8% (up 50% of 10 years), August +3.0% (up 67% of 9 years), September +1.3% (up 56% of 9 years), October -1.0% (up 56% of 9 years), November +9.2% (up 70% of 10 years), December -1.2% (up 30% of 10 years). In other words, BL historically rose in January, May, June, July, August, September, November, and fell in February, March, April, October, December.
Does BlackLine Systems, Inc. really go up in November?
Over 2016-2026, November is BlackLine Systems, Inc.'s strongest month: +9.2% on average, positive in 7 of 10 years. At the other end, March shows -3.2%. 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 BlackLine Systems, Inc. stock go up or down in June?
Over 10 years, BL rose +2.5% on average in June, finishing the month up 8 times out of 10 (80%). Median: +3.7%. It's one of its most consistent months. ⚠️ 10 years of data is not a prediction.
Does BlackLine Systems, Inc. stock go up or down in August?
Over 9 years, BL rose +3.0% on average in August, finishing the month up 6 times out of 9 (67%). Median: +3.4%. Results are split year to year — there's no clear pattern. ⚠️ 9 years of data is not a prediction.
Does BlackLine Systems, Inc. stock go up or down in February?
Over 10 years, BL fell -2.9% on average in February, finishing the month up 4 times out of 10 (40%). Median: -3.8%. Results are split year to year — there's no clear pattern. ⚠️ 10 years of data is not a prediction.
Does BlackLine Systems, Inc. stock go up or down in May?
Over 10 years, BL rose +1.3% on average in May, finishing the month up 6 times out of 10 (60%). Median: +0.6%. Results are split year to year — there's no clear pattern. ⚠️ 10 years of data is not a prediction.
Does BlackLine Systems, Inc. stock go up or down in September?
Over 9 years, BL rose +1.3% on average in September, finishing the month up 5 times out of 9 (56%). Median: +2.6%. Results are split year to year — there's no clear pattern. ⚠️ 9 years of data is not a prediction.
Does BlackLine Systems, Inc. stock go up or down in December?
Over 10 years, BL fell -1.2% on average in December, finishing the month up 3 times out of 10 (30%). Median: -2.5%. It's one of its weakest months. ⚠️ 10 years of data is not a prediction.
What is the best month to buy BlackLine Systems, Inc. stock?
Historically, November: over the last 11 years, BL gained +9.2% on average that month and finished up 70% of the time (10 years observed). March is the weakest month (-3.2%). This is not a prediction: 11 years is a small sample, and the past is under no obligation to repeat.
Why does BlackLine Systems, Inc. stock often rise in November?
November has averaged as its best month over 11 years (+9.2%, up 70% of years). No clearly established recurring seasonal driver explains this month — it's a statistical tendency over 11 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 BL it's November (+9.2% on average over 11 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 BL, June is the most consistent month (80% positive years). We also rank all 12 months for the whole market.
Does stock seasonality actually work?
Careful. A month that rose 11 times out of 11 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 BL's real monthly closing prices from 2016 to 2026 (11 years), source Yahoo Finance. Each cell = the price change over that month. Price performance, excluding dividends. Incomplete months and quote gaps are excluded.